Math is included with Islamic teachings.

What calculation did I do wrong?

The M-60A3 is better then the T-72. And less then 10% of the indian tanks are superior to the T-72.

And believe met the M-60A3 is superiour. I've seen battles where whole units of T-72 where wiped out without M-60A3 losses.

"O People of the Scripture! Do not exaggerate in your religion nor utter aught concerning Allah save the truth. The Messiah, Jesus son of Mary, was only a messenger of Allah, and His word which He conveyed unto Mary, and a spirit from Him. So believe in Allah and His messengers, and say not "THREE". Cease! (it is) better for you! Allah is only One God. Far is it removed from His transcendent majesty that he should have a son. His is all that is in the heavens and all that is in the earth. And Allah is sufficient as Defender."

[Quran 4:171]