A cuboid-shaped fishbowl measuring 15 cm (cm) wide and 20 cm (cm) long contains water 10 cm (cm) high. When one stone was completely submerged in the water, the water level rose to 15 cm (cm). What is the volume in cubic centimeters (cm3) of this stone?
15 20 [OP_MUL] 15 10 [OP_SUB] [OP_MUL]
var_a = 15
var_b = 20
var_c = var_a * var_b
var_d = 15
var_e = 10
var_f = var_d - var_e
var_g = var_c * var_f
print(int(var_g))