#include <iostream>

using namespace std;

int main()
{
    int N,M,K,i,maxx=0,minx=0,maxy=0,miny=0,currx=0,curry=0;
    char c;
    cin>>N>>M>>K;
    for(i=1;i<=K;i++)
        {
            cin>>c;
            if (c=='R')
                {
                    currx--;
                    if (currx<minx) minx=currx;
                }
            if (c=='L')
                {
                    currx++;
                    if (currx>maxx) maxx=currx;
                }
            if (c=='U')
                {
                    curry++;
                    if (curry>maxy) maxy=curry;
                }
            if (c=='D')
                {
                    curry--;
                    if (curry<miny) miny=curry;
                }

        }
    N=max(0,N-maxx+minx);
    M=max(0,M-maxy+miny);
    cout<<M*N;







    return 0;
}