While the average height of A, B, and C is 130cm (cm), the average changes to 126 cm (cm) when D is added. D  What is the height of D?
126 4 [OP_MUL] 130 3 [OP_MUL] [OP_SUB]
var_a = 126
var_b = 4
var_c = var_a * var_b
var_d = 130
var_e = 3
var_f = var_d * var_e
var_g = var_c - var_f
print(int(var_g))