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40/7  =  5.714284714 ...

Sevenths are interesting

1/7  =  0.142857 ...  Take 7 x 2 to get 14, 14 x 2 to get 28, 28 x 2 to get 56 (then add 1) and keep cycling these digits ...

2/7  =  0.285714 ...  Same digits, just start with a different digit.

3/7  =  0.428571 ...  Ditto ...

4/7  =  0.571428 ...  Ditto ...

5/7  =  0.714285 ...  Ditto ...

6/7  =  0.857142 ...  Ditto ...

571428571/10000000000 = 0.0571428571

5 5/7