A, B, and C run from A to B at the same time. When A arrives at B, B is 20 meters away from B, and C is 40 meters away from B. When B arrives at B, C is 24 meters away from B, and AB is two How many meters is the ground?
甲乙丙三人同时从A地跑到B地，当甲到达B地时，乙离B地20米，丙离B地40米；当乙到达B地时，丙离B地24米，AB两地多少米？
<gadget id="calculator">40 - 24</gadget>
<output>16</output>

<gadget id="calculator">20 - 16</gadget>
<output>4</output>

<gadget id="calculator">24 / 4</gadget>
<output>6</output>

<gadget id="calculator">20 * 6</gadget>
<output>120</output>

<result>120</result>