If A and B are reciprocals of each other, then ((A)/2)*((B)/5)=how much.
如果A、B互为倒数，那么((A)/2)*((B)/5)=多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>