Cars A and B start from places A and B at the same time, and drive towards each other. Car A travels 60 kilometers per hour, and car B travels 40 kilometers per hour. Finally, they meet at a distance of 80 kilometers from the midpoint of the two places. , How many kilometers are the distance between the two places B?
甲、乙两车同时分别从A、B两地出发，相向而行，甲车每小时行60千米，乙车每小时行40千米，结果距两地中点80千米处相遇，A、B两地相距多少千米．
<gadget id="calculator">40 + 60</gadget>
<output>100</output>

<gadget id="calculator">60 - 40</gadget>
<output>20</output>

<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 * (1/10)</gadget>
<output>8</output>

<gadget id="calculator">100 * 8</gadget>
<output>800</output>

<result>800</result>