30 trees are planted on two pavements in the street, 9 metres (m) apart. If trees are planted at the beginning and at the end, how many metres (m) is this road?
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))