When only even numbers are selected among all natural numbers, find the sum up to the 123rd in descending order.
2 2 123 1 [OP_SUB] 2 [OP_MUL] [OP_ADD] 2 [OP_LIST_ARANGE] [OP_LIST_SUM]
var_a = 2
var_b = 2
var_c = 123
var_d = 1
var_e = var_c - var_d
var_f = 2
var_g = var_e * var_f
var_h = var_b + var_g
var_i = 2
list_a = [i for i in range(var_a, var_h + 1, var_i)]
list_a = [float(i) for i in list_a]
var_j = sum(list_a)
print(int(var_j))