There is a reading room 4 floors higher than the academy which is on the 7th floor, and there is a bookstore that is 9 floors lower than the reading room. Find the floor where the bookstore is located.
7 4 [OP_ADD] 9 [OP_SUB]
var_a = 7
var_b = 4
var_c = var_a + var_b
var_d = 9
var_e = var_c - var_d
print(int(var_e))