YOU SAID:

I saw how many bugs ate the yellow school truck

INTO JAPANESE

黄色いスクールトラックを食べたバグの数を見ました

BACK INTO ENGLISH

I saw the number of bugs that ate a yellow school truck

INTO JAPANESE

黄色のスクールトラックを食べたバグの数を見ました

BACK INTO ENGLISH

I saw the number of bugs that ate a yellow school truck