If we stipulate 2! =2*1, 3! =3*2*1, 4! =4*3*2*1, then ((8!)/(9!))=how much.
如果我们规定2！=2*1，3！=3*2*1，4！=4*3*2*1，那么((8！)/(9！))=多少．
<gadget id="calculator">8 * 7 * 6 * 5 * 4 * 3 * 2 * 1</gadget>
<output>40_320</output>

<gadget id="calculator">9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1</gadget>
<output>362_880</output>

<gadget id="calculator">40_320 / 362_880</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>