From point A to point B, travel 60 kilometers per hour and arrive on time, actually travel 20 kilometers per hour, and arrive 0.5 hours earlier. How many kilometers are there between places A and B?
从甲地到乙地，每小时行60千米，能准时到达，实际每小时多行20千米，结果提前0.5小时到达，甲、乙两地相距多少千米？
<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<gadget id="calculator">0.5 / 20</gadget>
<output>0.025</output>

<gadget id="calculator">80 * 0.025</gadget>
<output>2</output>

<gadget id="calculator">2 * 60</gadget>
<output>120</output>

<result>120</result>