It is known that 1△4=1*2*3*4, 5△3=5*6*7, according to this rule, calculate (3△5)/(4△4)= how much.
已知1△4=1*2*3*4，5△3=5*6*7，按此规定，计算(3△5)/(4△4)=多少．
<gadget id="calculator">3 * 4 * 5 * 6 * 7</gadget>
<output>2_520</output>

<gadget id="calculator">4 * 5 * 6 * 7</gadget>
<output>840</output>

<gadget id="calculator">2_520 / 840</gadget>
<output>3</output>

<result>3</result>