I am 66 kg and 168cm tall, male, office worker. Gym bros tell me that I should have 66*2.2=145.2g of protein daily to build muscle OR 1g of protein per pound of body mass which means 66 kg converted to pound is 145.5 pound which is also my protein daily intake in g. 145.2 and 145.5 do not look different from each other, to be honest.
So... gym bros also tell me that chicken breast is best. I do not have a weighing scale. So... my question is

how many chicken breast to eat per day to get my daily protein intake which is 145.2-145.5? Tq in advanced.

You need to take your lean muscle mass into consideration as well.

Just focus getting protein from main source such as whey, meat, milk & egg to at least 100g above. The rest of your food also have protein. That should suffice. No need headache.

I stopped tracking calories after 3 months. It's not very productive, and that's not how calories work. Our bodies are not thermal generators and it doesn't run on heat.

Take the majority of your "calories" from fat, i.e >50%, cut all carbs if possible, and if you *must* have carbs, limit it to 20 grams a day. The rest of your macro can be protein. When you eat, you eat until you are full. Drink water only when you are thirsty, and avoid eating 3-4 hours prior to sleeping.

One thing about protein and the use is that in order for your body to form a certain protein molecule, it will need the entire set of amino acids. Think of it as spelling a word, if it's missing a letter, then the set of letters is useless, and will be converted to glucose (through gluconeogenesis). So take as many different types of protein as you can, but beef and eggs are typically the most complete and bioavailable sources.

You think carbs are good because you don't know what happens to carbs in your body, and how your body uses carbs. Proteins are useful only if your body can use them, otherwise, they are converted into glucose or glucagon or anyone one of those variants.

You think this and that macroprotein is good because you're thinking that's how food works, when the proper way to understand nutrition, is to learn how the body works.

Meat sources contain more complete protein, but they don't always have all of it, because your body uses all types of amino acids to make collagen, to make hormones, to make keratin, and so on and so forth. Also, you gotta know not all food have the same bioavailability, but meat and eggs have the highest.

https://en.wikipedia.org/wiki/Protein_quality
Eggs seems to be higher quality more rounded source of protein to me. As I had said in another post, excess protein gets converted into glucose, and that raises insulin, something I don't want. I stay away from protein powder because of the artificial sweeteners.

Meat sources contain more complete protein, but they don't always have all of it

I attached a YouTube video. Watch it before you simply start accusing people

Hmm... I should have phrased it as "quality protein", rather than complete.

Now my turn. Since you made the claim that carbs are good, can you explain how it is good, and what happens when it enters the body?

Nope. Glycogen is what is needed for intense workouts. Your muscles can only store so much of glycogen, less than a day's worth. When you drink energy drinks, you have to wait 30-60 minutes to even feel the effect. Glycogen can be replenished through conversion of glucose, and through breaking down protein into glucose. The body makes all the glucose it needs, and has ZERO needs for dietary carbs.

Keto might raise cholesterol levels, but it doesn't cause heart attack. Heart attacks are caused by atherosclerosis, a condition that is far more likely to happen on a high carb diet.

Keto diet should be used in ALL conditions, because that is the natural metabolic condition of the human body. ALL humans are born in ketosis.

You didn't answer one of my question, which is what happens when you carbs enter your body. Answer is your body breaks it down with enzymes (typically amilase) into simple sugars, monosaccharides/disaccharides, and is absorbed in your digestive system. This raises your blood sugar which raises your insulin which results in fat conversion and fat storage. Eating 60% carbs is an invitation to early life metabolic disease.