Known: 2*3=2*3*4, 4*5=4*5*6*7*8, 5*6=5*6*7*8*9*10, then: (4*4 )/(3※3)=how much.
已知：2※3=2*3*4，4※5=4*5*6*7*8，5※6=5*6*7*8*9*10，…那么：(4※4)/(3※3)=多少．
<gadget id="calculator">4 * 5 * 6 * 7</gadget>
<output>840</output>

<gadget id="calculator">3 * 4 * 5</gadget>
<output>60</output>

<gadget id="calculator">840 / 60</gadget>
<output>14</output>

<result>14</result>