#include<cstdio>
using namespace std;
int main()
{
	int n,m,k;
	int x=0,y=0;
	int i;
	char ch;
	int xmi=0,ymi=0,xma=0,yma=0;
	scanf("%d %d",&n,&m);
	scanf("%d\n",&k);
	for(i=1;i<=k;i++)
	{
		scanf("%c",&ch);
		switch(ch)
		{
			case 'U':{x--;if(x<xmi) xmi=x;break;}
			case 'D':{x++;if(x>xma) xma=x;break;}
			case 'L':{y--;if(y<ymi) ymi=y;break;}
			case 'R':{y++;if(y>yma) yma=y;break;}
		}
	}
	x=xma;
	xma=n+xmi;
	xmi=x;
	y=yma;
	yma=m+ymi;
	ymi=y;
	if(xma-xmi<=0)
		printf("0\n");
	else
	{
		if(yma-ymi<=0)
			printf("0\n");
		else
			printf("%d\n",((xma-xmi)*(yma-ymi)));
	}
	return 0;
}