YOU SAID:
The rich do not know the price of a banana
INTO JAPANESE
金持ちはバナナの値段を知らない
BACK INTO ENGLISH
The rich don't know the price of bananas.
INTO JAPANESE
金持ちはバナナの値段を知らない。
BACK INTO ENGLISH
The rich don't know the price of bananas.
That didn't even make that much sense in English.