#include<stdio.h>
struct square{
    int edge;
    int area;
};
int main(){
    struct sqaure sq;
    scanf("%d",&sq.edge);
    if(sq.edge<=0){
        printf("Invalid input\n");
        return 0;
    }
    sq.area=sq.edge*sq.edge;
    printf("%d square metres\n",sq.area);
}