#include<stdio.h>
struct square
{
    int edge;
    int area;
};
int main()
{
    struct square s;
    scanf("%d", %s,edge);
    if(s,edge<=0)
    {
        printf("Invalid input");
        retuen 0;
    }
    s.area=s,edge*s,edge;
    printf("%d square meters",s.area);
    return 0;
}