def mul(a=1, b=1, *args):
num = a * b
if args:
return mul(num, args[0], *args[1:])
return num
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愿偷得浮生半日闲
def mul(a=1, b=1, *args):
num = a * b
if args:
return mul(num, args[0], *args[1:])
return num