多少除以多少等于0.8123123123123123无限循环
问题描述：
多少除以多少等于0.8123123123123123无限循环
答
0.8123123.
= 0.8 + 0.0123123.
= 8/10 + 1/10 × 123/999
= 8/10 + 1/10 × 41/111
= 8/10 + 41/1110
= (888+41)/1110
= 929/1110