A car drives from place A to place B at 40 kilometers per hour. After 3 hours, the remaining distance is 8 kilometers less than half of the whole journey. If you switch to driving at a speed of 52 kilometers per hour, how many hours will it take to reach point B?
汽车从甲地开往乙地，每小时行40千米，3小时后剩下的路程比全程的一半少8千米．如改用每小时52千米的速度行驶，再行几小时到达乙地？
<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">120 - 8</gadget>
<output>112</output>

<gadget id="calculator">112 - 8</gadget>
<output>104</output>

<gadget id="calculator">104 / 52</gadget>
<output>2</output>

<result>2</result>