YOU SAID:

This guy is so dumb like actually signing this is crazy

INTO JAPANESE

この男は本当に愚かで、これに署名するのはクレイジーです

BACK INTO ENGLISH

This guy is really stupid and crazy for signing this

INTO JAPANESE

この男は本当に愚かで、これに署名するなんて頭がおかしい

BACK INTO ENGLISH

This guy is really stupid and crazy for signing this