A total of 30 trees are planted 9 meters (m) apart on either side of a road from beginning to end. Find the length of this road in meters (m).
30 2 [OP_DIV] 1 [OP_SUB] 9 [OP_MUL]
var_a = 30
var_b = 2
var_c = var_a / var_b
var_d = 1
var_e = var_c - var_d
var_f = 9
var_g = var_e * var_f
print(int(var_g))