It takes a car 12 hours to drive from place A to place B. If the speed increases (1/5) when returning from place B to place A, then how many hours will it take.
一辆汽车从甲地开往乙地，共用了12小时，从乙地返回甲地时，如果速度提高(1/5)；那么共用多少小时．
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(1/12) * (6/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / (1/10)</gadget>
<output>10</output>

<gadget id="calculator">12 + 10</gadget>
<output>22</output>

<result>22</result>