It is stipulated that a※b=2a+b/2, if a※10=99, 10※a=how much.
规定a※b=2a+b/2，若a※10=99，10※a=多少．
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">47 / 2</gadget>
<output>47/2 = around 23.5</output>

<gadget id="calculator">20 + (47/2)</gadget>
<output>87/2 = around 43.5</output>

<result>87/2 = around 43.5</result>