If a and b are reciprocals of each other, and (2/(a))=((b)/(x)), then x=how much.
如果a与b互为倒数，且(2/(a))=((b)/(x))，那么x=多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>