If A/5=B/4, then B*How much=A*5.
如果A/5=B/4，那么B*多少=A*5．
<gadget id="calculator">10 * 5</gadget>
<output>50</output>

<gadget id="calculator">50 / 8</gadget>
<output>25/4 = around 6.25</output>

<result>25/4 = around 6.25</result>