YOU SAID:
Grapes are a useful product to make wine
INTO JAPANESE
ブドウはワインを作るのに便利な製品です
BACK INTO ENGLISH
Grapes are a useful product for making wine
INTO JAPANESE
ぶどうはワインを作るのに便利な製品です
BACK INTO ENGLISH
Grapes are a useful product for making wine
That didn't even make that much sense in English.