Please fill in the "*" or "/" in the box of the following formula to make the equation true: 9 ports, 8 ports, 7 ports, 6 ports, 5 ports, 4 ports, 3 ports, 2 ports, 1=(2/35), total How many different filling methods are there.
请在下面算式的方框中填入"*"号或"/"号，使等式成立：9口8口7口6口5口4口3口2口1=(2/35)，总共有多少种不同的填法．
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