A and B are walking opposite each other in the same town, and the distance that A needs to travel is three times that of B. A’s speed is 12 kilometers per hour, and B’s speed is 9 kilometers per hour. Today A departs 2 hours earlier than B. When B arrives at the destination, A is still 36 kilometers away from the destination. How many kilometers are the distance between the two places?
甲、乙两人于同一镇相背而行，甲要行的距离为乙的3倍．甲时速12千米，乙时速9千米，今甲比乙提早2小时出发，当乙到达目的地时，甲距目的地仍有36千米．两地相距多少千米？
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">24 + 36</gadget>
<output>60</output>

<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<gadget id="calculator">27 - 12</gadget>
<output>15</output>

<gadget id="calculator">60 / 15</gadget>
<output>4</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">9 * 4 * 4</gadget>
<output>144</output>

<result>144</result>