YOU SAID:
I decided to eat fifteen sandwiches in my car today.
INTO JAPANESE
私は今日私の車で15個のサンドイッチを食べることにした。
BACK INTO ENGLISH
I decided to eat 15 sandwiches in my car today.
INTO JAPANESE
私は今日私の車で15個のサンドイッチを食べることにした。
BACK INTO ENGLISH
I decided to eat 15 sandwiches in my car today.
You've done this before, haven't you.