YOU SAID:

i stepped on a sandwich and ate 2 a banana

INTO JAPANESE

サンドイッチを踏んでバナナを2個食べました

BACK INTO ENGLISH

I stepped on the sandwich and ate two bananas

INTO JAPANESE

サンドイッチを踏んでバナナを2本食べました

BACK INTO ENGLISH

I stepped on the sandwich and ate two bananas