Description
In Minecraft, players can use different kinds of blocks to create various buildings.
Given a valley with N blocks and each block has a length of L.
Pegura, a rookie vtuber, is wondering how deep the valley is.
Can you donate a superchat to tell her the height H ?
Input
Two integers N and L (1 <= N, L <= 1000) separated by a blank.
Output
The height H.
Note that you do not need to print '\n' at the end of the output.