A travels from the East Village to the West Village at 10 kilometers per hour, and B travels from the West Village to the East Village at 8 kilometers per hour. If B starts 1 hour earlier than A, they meet at the midpoint of the two villages. How far are the villages?
甲从东村走向西村，每小时行10千米，乙从西村走向东村，每小时行8千米，如果乙比甲提前1小时动身，则他们恰好在两村中点处相遇，问两村相距多远？
<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">10 + 8</gadget>
<output>18</output>

<gadget id="calculator">4 * 18</gadget>
<output>72</output>

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

<result>80</result>