YOU SAID:
they did surgery on my funni potato
INTO JAPANESE
彼らは私のfunniポテトで手術をした
BACK INTO ENGLISH
They underwent surgery at my funni potato
INTO JAPANESE
彼らは私のfunniポテトで手術を受けた
BACK INTO ENGLISH
They underwent surgery at my funni potato
Come on, you can do better than that.