YOU SAID:

i think this guy is one of the stupid person in the earth

INTO JAPANESE

この男は地球上で最も愚かな人物の一人だと思う

BACK INTO ENGLISH

I think this man is one of the stupidest men on the planet.

INTO JAPANESE

この男は地球上で最も愚かな男の一人だと思う。

BACK INTO ENGLISH

I think this man is one of the stupidest men on the planet.