A rectangle has a length of 13 centimeters (cm) and a perimeter of 50 centimeters (cm). Find the horizontal length.
50 2 [OP_DIV] 13 [OP_SUB]
var_a = 50
var_b = 2
var_c = var_a / var_b
var_d = 13
var_e = var_c - var_d
print(int(var_e))