There are 20 books (a) and books (b) in total, and there are four more books (a) than books (b). How many books (a) are there?
20 4 [OP_ADD] 2 [OP_FDIV]
var_a = 20
var_b = 4
var_c = var_a + var_b
var_d = 2
var_e = var_c // var_d
print(int(var_e))