car drives from place A to place B with a speed of 40 kilometers per hour when going there, and the speed increases (1/4) when returning. As a result, it only takes 2 hours to return to place A. What is the distance between A and B?
一辆汽车从甲地开往乙地，去时速度为每小时40千米，回来时速度提高(1/4)，结果只用了2小时就回到甲地．甲、乙两地的距离是多少？
<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">40 * (5/4) * 2</gadget>
<output>100</output>

<result>100</result>