YOU SAID:

There's a hundred and four days of summer vacation

INTO JAPANESE

夏休みは百四日間あります

BACK INTO ENGLISH

There are four hundred days of summer vacation

INTO JAPANESE

夏休みは400日あります

BACK INTO ENGLISH

There are 400 days for summer vacation

INTO JAPANESE

夏休みは400日あります

BACK INTO ENGLISH

There are 400 days for summer vacation