If a and b are reciprocals of each other, and (5/(a))=((b)/(x)), then x=how much.
若a与b互为倒数，且(5/(a))=((b)/(x))，则x=多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>