YOU SAID:

it's been eighty four years

INTO JAPANESE

80 4 年が経ちました

BACK INTO ENGLISH

80 four years have passed since

INTO JAPANESE

80 から 4 年が経ちました

BACK INTO ENGLISH

Four years have passed since the 80

INTO JAPANESE

80 から 4 年が経ちました

BACK INTO ENGLISH

Four years have passed since the 80