There is a room size n×m. Find the maximum number of tiles of size k×k that can be placed in the room.
The figure shows one of the possible maximum answers for n=5,m=3,k=2.
The first line contains an integer n (1≤n≤1000).
The second line contains an integer m (1≤m≤1000).
The third line contains an integer k (1≤k≤1000).
Print the maximum number of whole tiles of size k×k that can be placed in the room.