fraction为啥出现结果不一样呢

import fraction,为什么呢?

from fractions import Fraction
Fraction(1708227363155544, 4636617128565048)
Fraction(7, 19)

from fractions import Fraction
Fraction(1708227363155544/ 4636617128565048)
的结果算出来不一样啊用斜杠为啥不能约分捏

img