YOU SAID:

what in the name of heck, why would you do that

INTO JAPANESE

いったい何のために、なぜそんなことをするのですか

BACK INTO ENGLISH

What on earth and why would you do that?

INTO JAPANESE

いったい何を、なぜそんなことをするのでしょうか？

BACK INTO ENGLISH

What exactly do you do and why do you do that?

INTO JAPANESE

正確には何をするのですか?なぜそうするのですか?

BACK INTO ENGLISH

What exactly does it do and why do it do it?

INTO JAPANESE

それは正確に何をするのでしょうか、そしてなぜそれを行うのですか？

BACK INTO ENGLISH

What exactly does it do and why does it do it?

INTO JAPANESE

それは正確に何をするのでしょうか、そしてなぜそれを行うのですか？

BACK INTO ENGLISH

What exactly does it do and why does it do it?