Kiyoung drew a circle with a diameter of 80 centimeters (cm). The radius of the circle drawn by Kiyoung is 4 times longer than the radius of the circle drawn by Gayeong. Find the radius of the circle Gayoung drew.
80 4 [OP_DIV] 2 [OP_DIV]
var_a = 80
var_b = 4
var_c = var_a / var_b
var_d = 2
var_e = var_c / var_d
print(int(var_e))