#include <iostream>
int main () {
   int x=4;
   int y=6;
int ploshad (int x, int y);
void print (int x);
int main () {
int s;
s=ploshad (x,y);
print (s);
return 0;
}
int ploshad (int x, int y) {
return (y*x^2*ctg(3,14/y))/4;
}
void print (int x)
std :: cout << x << std :: endl;
}