A car drives from place A to place B at a speed of 40 kilometers per hour, arrives in 10 hours, and returns 25% faster than when it came, how many hours does it take to return?
一辆车以每小时40千米的速度从甲地开往乙地，10小时到达，返回时速度比来时快25%，返回需用多少小时？
<gadget id="calculator">40 * 10</gadget>
<output>400</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">40 * (5/4)</gadget>
<output>50</output>

<gadget id="calculator">400 / 50</gadget>
<output>8</output>

<result>8</result>