Two people, A and B, walk towards each other from two places, and they can meet each other in 8 hours. If they travel 3 kilometers less each hour, then they can meet each other in 10 hours. How many kilometers are the distance between the two places?
甲乙两人分别从两地相向而行，8小时可以相遇，如果每小时两人各少行3千米，那么10小时才能相遇，两地相距多少千米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<gadget id="calculator">(1/8) - (1/10)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">2 / (1/40)</gadget>
<output>80</output>

<gadget id="calculator">3 * 80</gadget>
<output>240</output>

<result>240</result>