The width of the rectangular-shaped park is 9 kilometers (km). If you walk around the edge of the park, you walk 46 kilometers (km). How many kilometers (km) is the length of the park?
46 2 [OP_DIV] 9 [OP_SUB]
var_a = 46
var_b = 2
var_c = var_a / var_b
var_d = 9
var_e = var_c - var_d
print(int(var_e))