YOU SAID:

my potato has forty dads

INTO JAPANESE

私のじゃがいもは40人のお父さんがいます

BACK INTO ENGLISH

My potato has 40 fathers

INTO JAPANESE

私のじゃがいもには40人の父親がいます

BACK INTO ENGLISH

There are 40 fathers in my potato

INTO JAPANESE

私のじゃがいもには40人の父親がいます

BACK INTO ENGLISH

There are 40 fathers in my potato