#include <iostream>

using namespace std;

int main()
{
	char c;
	int n, m, k, x, y, mx, my, mix, miy;
	cin >> n >> m >> k; cin.get();

	x = y = mx = my = mix = miy = 0;
	for(int i = 1; i <= k; ++i)
	{
		cin >> c;
		switch(c)
		{
			case 'U':{--x; break;}
			case 'D':{++x; break;}
			case 'L':{--y; break;}
			case 'R':{++y; break;}
		}
		if(x > mx) mx = x;
		if(x < miy) miy = x;
		if(y > my) my = y;
		if(y < miy) miy = y;
	}

	int r = (n-mx+mix)*(m-my+miy);
	if(r > 0)
        cout << r;
    else
        cout << 0;
}