If 2! =2*3, 3! =3*4*5, 5! =5*6*7*8*9． Please calculate ((6!)/(8!)) = how much according to this rule.
如果2！=2*3，3！=3*4*5，5！=5*6*7*8*9．请你按此规则计算((6!)/(8!))=多少．
<gadget id="calculator">6 * 7 * 8 * 9 * 10 * 11</gadget>
<output>332_640</output>

<gadget id="calculator">8 * 9 * 10 * 11 * 12 * 13 * 14 * 15</gadget>
<output>259_459_200</output>

<gadget id="calculator">332_640 / 259_459_200</gadget>
<output>1/780 = around 0.001282</output>

<result>1/780 = around 0.001282</result>