You sold 30 books on the first day. On the second day, they sold 5 times the number of books sold on the first day. How many more books were sold on Day 2 than on Day 1?
30 5 [OP_MUL] 30 [OP_SUB]
var_a = 30
var_b = 5
var_c = var_a * var_b
var_d = 30
var_e = var_c - var_d
print(int(var_e))