travels 11 kilometers per hour, and B travels 13 kilometers per hour. A travels south from Nanzhuang, while B travels north from Beizhuang. After 3 hours, the two were separated by 80 kilometers. How many kilometers are there between the north and the south villages?
甲每小时行11千米，乙每小时行13千米，甲从南庄向南行，同时乙从北庄向北行．经过3小时后，两人相隔80千米．南北两庄相距多少千米？
<gadget id="calculator">11 + 13</gadget>
<output>24</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<gadget id="calculator">80 - 72</gadget>
<output>8</output>

<result>8</result>