YOU SAID:

I ate fifty hot dogs and they were good.

INTO JAPANESE

私は50匹のホットドッグを食べ、彼らは良かったです。

BACK INTO ENGLISH

I ate 50 hot dogs and they were good.

INTO JAPANESE

私は50のホットドッグを食べ、彼らは良かったです。

BACK INTO ENGLISH

I ate 50 hot dogs and they were good.