Python3计算组合数，怎么编号列出组合结果？

m = input() # 总数
n = input() # 从m取n个

print(组合数函数(m.n))

>>> from itertools import combinations as comb
>>> m,n = eval(input())
8,3
>>> len(list(comb(range(m),n)))
56
>>> 8*7*6/1/2/3
56.0