The sum of the legs of chickens and pigs in Yumi's farm is 48. If there are 9 pigs on the farm, how many chickens are there?
48 4 9 [OP_MUL] [OP_SUB] 2 [OP_DIV]
var_a = 48
var_b = 4
var_c = 9
var_d = var_b * var_c
var_e = var_a - var_d
var_f = 2
var_g = var_e / var_f
print(int(var_g))