Density

Version: Phuoc Hung OJ Extended

Problem Statement

Given an object’s mass $m$ and positive volume $v$, its density is $\rho=\dfrac mv$. Compute the density and print exactly 4 decimal places. The resulting unit is mass per unit volume.

Input

The only line contains real mass $m$ and volume $v$, in that order.

Output

Print the density with exactly 4 decimal places.

Subtasks

• Subtask 1 (100 points): $m\ge0$; $v>0$.

Examples

Example 1

Input

10 2

Output

5.0000

Explanation. Substituting 10, 2 into m / v gives approximately 5. The required output formatting produces 5.0000.

Example 2

Input

1 3

Output

0.3333

Explanation. Substituting 1, 3 into m / v gives approximately 0.333333333333. The required output formatting produces 0.3333.

Example 3

Input

12.5 0.25

Output

50.0000

Explanation. Substituting 12.5, 0.25 into m / v gives approximately 50. The required output formatting produces 50.0000.