第15238题
补全Python递归计算1~n连续自然数乘积(阶乘)的空缺部分
def Chengji(n):
    if n <= 1:
        return 1
    else:
        return ___
print(Chengji(3))
A

n*Chengji(n)

B

n*Chengji(n-1)

C

n*Chengji(n+1)

D

n×Chengji(n-1)