Currency Conversion

Source: Phước Hưng OJ

Version: Phuoc Hung OJ Extended

Problem Statement

Given original amount $x$ and exchange rate $r$, compute $x\times r$. This PHOJ edition has a non-negative integer amount and a rate from a fixed set; print two decimals.

Input

One line with integer $x$ and real rate $r$.

Output

Print $x\times r$ with exactly two decimals, no currency symbol.

Subtask

• Subtask 1 — 100 points: $0\le x\le10^6$; $r\in\{0.5,0.75,1.25,2.5,3.75\}$.

Example

Input

100 1.25

Output

125.00

Explanation

$100\times1.25=125$; two-decimal formatting produces 125.00.