真分数a/7化为小数后,在小数点后1994个数位上的数字和为8972,那么a是多少?)~'G+j9@2J'k8O
算式:提示7f;e5L0_:L)~'G+j9@2J'k8O
答:a是6}5e'h2i+{8h。)~'G+j9@2J'k8O