Given that AB=2, BC=3, and CD=5, find the value of (((AC)(BD))/(AD)).
已知A-B=2，B-C=3，C-D=5，求(((A-C)(B-D))/(A-D))的值．
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">2 + 8</gadget>
<output>10</output>

<gadget id="calculator">40 / 10</gadget>
<output>4</output>

<result>4</result>