It is known that 1*3=1*2*3, 4*5=4*5*6*7*8, then (6*4)/(3*4)=how much.
已知1*3=1*2*3，4*5=4*5*6*7*8，则(6*4)/(3*4)=多少．
<gadget id="calculator">6 * 7 * 8 * 9</gadget>
<output>3_024</output>

<gadget id="calculator">3 * 4 * 5 * 6</gadget>
<output>360</output>

<gadget id="calculator">3_024 / 360</gadget>
<output>42/5 = around 8.4</output>

<result>42/5 = around 8.4</result>