A = float(raw_input())
B = float(raw_input())
C = float(raw_input())
TRIANGULO = A * B / 2
CIRCULO = 3.14159 * (C * C)
TRAPEZIO = ((A + B) * C) / 2
QUADRADO = B * B
RETANGULO = A * B
print "TRIANGULO: %.3f" % TRIANGULO
print "CIRCULO: %.3f" % CIRCULO
print "TRAPEZIO: %.3f" % TRAPEZIO
print "QUADRADO: %.3f" % QUADRADO
print "RETANGULO: %.3f" % RETANGULO
QSA9IGZsb2F0KHJhd19pbnB1dCgpKQpCID0gZmxvYXQocmF3X2lucHV0KCkpCkMgPSBmbG9hdChyYXdfaW5wdXQoKSkKVFJJQU5HVUxPID0gQSAqIEIgLyAyCkNJUkNVTE8gPSAzLjE0MTU5ICogKEMgKiBDKQpUUkFQRVpJTyA9ICgoQSArIEIpICogQykgLyAyClFVQURSQURPID0gQiAqIEIKUkVUQU5HVUxPID0gQSAqIEIKcHJpbnQgIlRSSUFOR1VMTzogJS4zZiIgJSBUUklBTkdVTE8KcHJpbnQgIkNJUkNVTE86ICUuM2YiICUgQ0lSQ1VMTwpwcmludCAiVFJBUEVaSU86ICUuM2YiICUgVFJBUEVaSU8KcHJpbnQgIlFVQURSQURPOiAlLjNmIiAlIFFVQURSQURPCnByaW50ICJSRVRBTkdVTE86ICUuM2YiICUgUkVUQU5HVUxP