YOU SAID:

It's a crime to eat Big Mac while on a diet.

INTO JAPANESE

食事中に大きい Mac を食べることは犯罪です。

BACK INTO ENGLISH

Eating while eating a big Mac is a crime.

INTO JAPANESE

ビッグマックを食べながら食べることは犯罪です。

BACK INTO ENGLISH

Eating while eating a big Mac is a crime.