YOU SAID:

my grandma eats the potato on the cupboard

INTO JAPANESE

私のおばあちゃんは食器棚のポテトを食べる

BACK INTO ENGLISH

My grandmother eats potatoes in the cupboard

INTO JAPANESE

祖母は食器棚でジャガイモを食べる

BACK INTO ENGLISH

My grandmother eats potatoes in the cupboard