YOU SAID:

i ate 10 fingernails just to show them how much better i am

INTO JAPANESE

10本の指の爪を食べて、どれだけ上手いかを見せます。

BACK INTO ENGLISH

I will eat ten finger nails and show you how good you are.

INTO JAPANESE

私は10本の指の爪を食べて、あなたがどれほど上手いかをあなたに示すでしょう。

BACK INTO ENGLISH

I will eat ten finger nails and show you how good you are.