641/7 = 91.571428 recurring (that is, 91.571428571428...)
91.5714
71.2222
10.1217
0.0624
15.6341
160.25
641 millionths is 641 divided by one miilion. That is, 641/1,000,000
106.8333
10.8644
0.0078
641.25
you just wrote the answer.............................641