x = 0,2 ( 142857)
10x = 2.(142857)
10000000x = 2142857.(142857)
10000000x - 10x = 2142857.(142857) - 2.(142857)
9999990x = 2142855
x = 2142855/9999990
x = 0,2 ( 142857)
10x = 2.(142857)
10000000x = 2142857.(142857)
10000000x - 10x = 2142857.(142857) - 2.(142857)
9999990x = 2142855
x = 2142855/9999990