22/13=1.9222/13=17.12222/13=170.1222222/13=1709.5222222/13=17094.02222222/13=170940.222222222/13=1709401.9222222222/13=17094017.1.从以上可以看出规律,即6个一循环,余数分别为9,1,12,5,0,2(即2个2---7个2,8...