Uncle Li drives a motorcycle from A to B at a speed of 50 kilometers per hour. When driving 10 kilometers beyond the midpoint, there are still 140 kilometers to the end. How many hours does Uncle Li have to drive to get from A to B?
李叔叔驾驶摩托车以每小时50千米的速度从甲地开往乙地．当驾驶到超过中点10千米时，离终点还有140千米．李叔叔要行驶多少小时才能从甲地到达乙地？
<gadget id="calculator">140 + 10</gadget>
<output>150</output>

<gadget id="calculator">2 / 50</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">150 * (1/25)</gadget>
<output>6</output>

<result>6</result>