YOU SAID:

I can go to a pizza place when I'm 20

INTO JAPANESE

私は20歳のときにピザの場所に行くことができます

BACK INTO ENGLISH

I can go to the place of pizza when I am 20 years old

INTO JAPANESE

私は20歳の時にピザの場所に行くことができます

BACK INTO ENGLISH

I can go to the place of pizza when I am 20 years old