ship travels from port A to port B at a speed of 32 km/h and arrives in 10 hours. The speed when returning is 40 km/h, how many hours will it take to return?
一艘轮船从甲港到乙港，速度是32千米/时，10小时到达．返回时的速度是40千米/时，返回需要几小时？
<gadget id="calculator">10 / 40</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">32 * (1/4)</gadget>
<output>8</output>

<result>8</result>