If a car travels the whole journey in 4 hours (1/5), how much does it travel the whole journey every hour?
一辆车4小时行全程的(1/5)，每小时行全程的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) / 4</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>