YOU SAID:
I eat a lot of cereal last night
INTO JAPANESE
私は昨夜たくさんのシリアルを食べます
BACK INTO ENGLISH
I eat a lot of cereals last night
INTO JAPANESE
私は昨夜たくさんのシリアルを食べます
BACK INTO ENGLISH
I eat a lot of cereals last night
That didn't even make that much sense in English.