Floating-Point Value of a Fraction

Problem Background

Special for beginners, ^_^

Problem Description

Two integers $a$ and $b$ are given as the numerator and denominator, respectively, of the fraction $\,{a\over b}\,$. Compute its floating-point value (a double-precision floating-point number, kept to 9 decimal places).

Input Format

A single line containing two integers $a$ and $b$ ($b \ne 0$).

Output Format

A single line containing the floating-point value of the fraction $\,{a\over b}\,$ (a double-precision floating-point number, kept to 9 decimal places).

Sample Input

5 7

Sample Output

0.714285714

Constraints

1s, 1024KiB for each test case.

Hint

• Writing a / b directly gives 0 — dividing two int values yields no fractional part. Think about how to make the division produce a decimal.
• To keep 9 decimal places: use fixed together with setprecision(9).
• Check against the sample: 5 7 → 0.714285714.