Yoongi wants to read 3 of the 5 different books. Taking into account the order in which he reads them, how many ways can Yoongi read three books?
5 3 [OP_PERM]
var_a = 5
var_b = 3
var_c = 1
var_a = int(var_a)
var_b = int(var_b)
for i, elem in enumerate(range(var_b)):
    var_c = var_c * (var_a-i)
print(int(var_c))