#include <iostream>

using namespace std;

int main()
{
    int n, m, i, len, vertical = 0, horizontal = 0, up = 0, down = 0, left = 0, right = 0;
    char instruct, first;
    cin >> n >> m;
    cin >> len;
    for(i = 0 ; i < len ; i++)
    {
        cin >> instruct;
        if(i == 0)
            first = instruct;
        if(instruct == 'U')
        {
            vertical++;
            if(vertical > up)
                up = vertical;
        }
        if(instruct == 'D')
        {
            vertical--;
            if(vertical < down)
                down = vertical;
        }
        if(instruct == 'L')
        {
            horizontal--;
            if(horizontal < left)
                left = horizontal;
        }
        if(instruct == 'R')
        {
            horizontal++;
            if(horizontal > right)
                right = horizontal;
        }
    }
    vertical = up - down;
    horizontal = right - left;
    if(vertical > n || horizontal > m)
        cout << 0;
    else
    {
        if((first == 'U' && down == -1) || (first == 'D' && up == -1))
            vertical --;
        if((first == 'L' && right == -1) || (first == 'R' && left == -1))
            horizontal --;
        cout << (n - vertical) * (m - horizontal);
    }
    return 0;
}