#include <cstdio>
int main()
{
double a , b , c ;
scanf( "%lf%lf%lf", &a , &b , &c );
printf( "TRIANGULO: %.3lf\n", a / 2 * c ); //运算尽量乘除交替,防止溢出和精度损失
printf( "CIRCULO: %.3lf\n", 3.14159 * c * c );
printf( "TRAPEZIO: %.3lf\n", ( a + b ) / 2 *c );
printf( "QUADRADO: %.3lf\n", b * b );
printf( "RETANGULO: %.3lf\n", a * b );
return 0;
}