Three people, A, B, and C, walk 68 meters, 70.5 meters, and 72 meters per minute respectively. Now A and B go from Dongzhen to West Town, and C goes from West Town to Dongzhen. The three start at the same time. After C and B meet, they meet A after 2 minutes. How many kilometers are there between the two towns?
甲乙丙三人，每分钟分别行68米、70.5米，72米．现甲乙从东镇去西镇，丙从西镇去东镇，三人同时出发，丙和乙相遇后，又过了2分钟与甲相遇．东西两镇相距多少千米？
<gadget id="calculator">2 * 68 * 70.5</gadget>
<output>9_588</output>

<gadget id="calculator">2 * 68 * 72</gadget>
<output>9_792</output>

<gadget id="calculator">2 * 72 * 70.5</gadget>
<output>10_152</output>

<gadget id="calculator">2 * 72 * 72</gadget>
<output>10_368</output>

<gadget id="calculator">9_588 + 9_792 + 10_152 + 10_368</gadget>
<output>39_900</output>

<gadget id="calculator">72 - 68 - 72</gadget>
<output>-68</output>

<gadget id="calculator">70.5 + (-68)</gadget>
<output>2.5</output>

<gadget id="calculator">39_900 / 2.5 / 1_000</gadget>
<output>15.96</output>

<result>15.96</result>