Mincheol received 70 points in math, 80 points in Korean, and 90 points in English on the midterm exam. What is Mincheol's midterm average?
[OP_LIST_SOL] 70 80 90 [OP_LIST_EOL] [OP_LIST_MEAN]
var_a = 70
var_b = 80
var_c = 90
list_a= []
if "/" in str(var_c):
    var_c = eval(str(var_c))
list_a.append(var_c)
if "/" in str(var_b):
    var_b = eval(str(var_b))
list_a.append(var_b)
if "/" in str(var_a):
    var_a = eval(str(var_a))
list_a.append(var_a)
list_a.reverse()
list_a = [float(i) for i in list_a]
var_d = sum(list_a)/len(list_a)
print(int(var_d))