You want to divide 12 by some number. If the answer when you mistakenly subtract 42 is 30, what is the correct calculation result?
30 42 [OP_ADD] 12 [OP_DIV]
var_a = 30
var_b = 42
var_c = var_a + var_b
var_d = 12
var_e = var_c / var_d
print(int(var_e))