The box that holds 20 books is full of books (a) and books (b). If there are 4 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))