Uncle Li drove back and forth between A and B. It took 2 hours to go, and the speed increased by (1/4) when coming back. How many hours did it take to come back?
黎叔叔开车往返甲乙两地．去时用了2小时，回来时，速度提高了(1/4)，回来用了多少小时．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 4</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">(1/2) * (5/4)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / (5/8)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>