Description

Input the original price of an airline ticket (a positive integer between $3$ and $4$ digits, in yuan), and then input the discount rate (a decimal number with at most one digit after the decimal point). Calculate the actual price of the ticket after the discount (in yuan, rounding the result to the nearest ten yuan).

Input Format

Input consists of two numbers $x$ and $z$ ($100 \le x \le 10^4$, $1.0 \le z \le 9.9$), where $x$ is an integer representing the original price of the ticket, and $z$ is a decimal number with one digit after the decimal point representing the discount rate.

Output Format

Output a positive integer representing the discounted price of the ticket.

Sample

888 7.7

680