409335: GYM103486 B Arithmetic Exercise

Carol is learning fractional division nowadays. But she has problem determining if the answer is correct. Please you help her find out the correct answer.

A line contains three positive integers $$$A, B$$$ and $$$K$$$: indicating the numerator, the denominator and the number of decimal places to be output.

It's guaranteed that $$$1 \le A \le B \le 10^{3}, 1 \le K \le 10^{3}$$$.

Output one line contains a decimal $$$\frac{A}{B}$$$ with $$$K$$$ digits after the decimal point.

Please round the last decimal with round half up rule. Suppose the $$$K$$$-th digit is $$$x$$$ and the $$$K + 1$$$-th digit is $$$y$$$. If $$$5 \le y \le 9$$$, round the $$$K$$$-th digit to $$$x + 1$$$; otherwise, round it to $$$x$$$

It's guaranteed that $$$x$$$ won't be $$$9$$$ if $$$5 \le y \le 9$$$.

1 2 2

0.50

10 99 5

0.10101

656 939 10

0.6986155485

1 3 20

0.33333333333333333333