# Correct way to get an exact number of decimal digits (after the point)

If I type in

```
a = numerical_approx(1/14, digits=7)
print a
b=1/14
print b.n(digits=7)
```

I get

```
0.07142857
0.07142857
```

I count 8 digits after the point.

I wonder: How to get 7 digits as declared?