What is the average of the following numbers? Natural numbers from 12 to 53.
12 53 1 [OP_LIST_ARANGE] [OP_LIST_MEAN]
var_a = 12
var_b = 53
var_c = 1
list_a = [i for i in range(var_a, var_b + 1, var_c)]
list_a = [float(i) for i in list_a]
var_d = sum(list_a)/len(list_a)
print('{:.2f}'.format(round(var_d+1e-10,2)))