Item Total with Two Decimals

Version: Phuoc Hung OJ Extended

Problem Statement

An item has unit price $p$ and integer quantity $q$. Compute the total price $T=pq$ using the parsed real value and print exactly 2 decimal places. Format only after multiplication; do not round the unit price first.

Input

The only line contains real unit price $p$ and integer quantity $q$, in that order.

Output

Print total price $T$ with exactly 2 decimal places.

Subtasks

• Subtask 1 (100 points): $0\le p\le10^9$; $0\le q\le10^6$.

Examples

Example 1

Input

19.995 3

Output

59.98

Explanation. The ideal decimal product is $19.995\times3=59.985$. With Python 3 float arithmetic and .2f formatting, the output is 59.98; do not pre-round the unit price.

Example 2

Input

12.5 4

Output

50.00

Explanation. Substituting 12.5, 4 into p × q gives approximately 50. The required output formatting produces 50.00.

Example 3

Input

0.1 3

Output

0.30

Explanation. Substituting 0.1, 3 into p × q gives approximately 0.3. The required output formatting produces 0.30.