How many four-digit numbers can be formed by using even numbers less than 10 once?
0 10 1 [OP_SUB] [OP_LIST_EVEN] 4 [OP_LIST_GET_PERM] 3 [OP_LIST_DIVISIBLE] [OP_LIST_LEN]
var_a = 0
var_b = 10
var_c = 1
var_d = var_b - var_c
list_a = []
if var_a%2!=0:
    for i in range(var_a+1, var_d+1, 2):
        list_a.append(i)
else:
    for i in range(var_a, var_d+1, 2):
        list_a.append(i)
var_e = 4
list_b = [str(i) for i in list_a]
list_b = list(itertools.permutations(list_b, var_e))
list_b = [''.join(num_list) for num_list in list_b]
list_b = [str_num for str_num in list_b if str_num[0] != '0']
list_b = [float(i) for i in list_b]
var_f = 3
list_c = []
var_f = int(var_f)
for i in list_b:
    i = int(i)
    if i % var_f == 0:
        list_c.append(i)
var_g = len(list_c)
print(int(var_g))