A set of three bulgogi burgers and chicken burgers costs 21,000 won. If a bulgogi burger is 300 won more expensive than a chicken burger, how much does a chicken burger cost?
21000 3 [OP_DIV] 300 [OP_SUB] 2 [OP_DIV]
var_a = 21000
var_b = 3
var_c = var_a / var_b
var_d = 300
var_e = var_c - var_d
var_f = 2
var_g = var_e / var_f
print(int(var_g))