A rides a bicycle and travels 36 kilometers per hour, B walks 4 kilometers per hour, and C walks 3 kilometers per hour. They start from A to B at the same time. In order to make the three of them reach B at the same time as soon as possible, A respectively Pick up B and C for a certain distance, so that C walked 7.2 kilometers, then how many kilometers are the distance between A and B?
甲骑自行车每小时行36千米，乙步行每小时行4千米，丙步行每小时行3千米，他们同时从A地出发到B地，为了使三人尽快同时到达B地，甲分别接送乙、丙一段路程，这样丙步行了7.2千米，那么A，B两地相距多少千米．
<gadget id="calculator">7.2 / 3</gadget>
<output>2.4</output>

<gadget id="calculator">36 * 2.4</gadget>
<output>86.4</output>

<gadget id="calculator">86.4 + 7.2</gadget>
<output>93.6</output>

<gadget id="calculator">93.6 / 2</gadget>
<output>46.8</output>

<gadget id="calculator">9.9 + 46.8</gadget>
<output>56.7</output>

<result>56.7</result>