Yoongi is going to multiply a number by 7. But when he accidentally added 9, the result was 30. Find the correct calculation result.
30 9 [OP_SUB] 7 [OP_MUL]
var_a = 30
var_b = 9
var_c = var_a - var_b
var_d = 7
var_e = var_c * var_d
print(int(var_e))