YOU SAID:
Hello do you know where I can eat potato
INTO JAPANESE
こんにちは、ジャガイモをどこで食べられるか知っていますか
BACK INTO ENGLISH
Hello, Do you know where to eat potatoes
INTO JAPANESE
こんにちは、ジャガイモを食べる場所を知っていますか
BACK INTO ENGLISH
Hello, Do you know where to eat potatoes
That didn't even make that much sense in English.