A car (2/5) travels 20 kilometers in an hour, how many kilometers does it travel in an average hour?
汽车(2/5)小时行20千米，平均每小时行多少千米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 / (2/5)</gadget>
<output>50</output>

<result>50</result>