YOU SAID:
i had five gallons of ice cream today
INTO JAPANESE
今日は5ガロンのアイスクリームを食べました
BACK INTO ENGLISH
Today I ate 5 gallons of ice cream
INTO JAPANESE
今日は5ガロンのアイスクリームを食べました
BACK INTO ENGLISH
Today I ate 5 gallons of ice cream
That didn't even make that much sense in English.