At Seongmin's school, there are upper and lower math classes. The math average of the top 20 students in the upper class is 42 points, and the average of the bottom 20 students in the lower class is 38 points. What is the average math score of Seongmin's class?
20 42 [OP_MUL] 20 38 [OP_MUL] [OP_ADD] 20 20 [OP_ADD] [OP_DIV]
var_a = 20
var_b = 42
var_c = var_a * var_b
var_d = 20
var_e = 38
var_f = var_d * var_e
var_g = var_c + var_f
var_h = 20
var_i = 20
var_j = var_h + var_i
var_k = var_g / var_j
print(int(var_k))