Xiaoming and Xiaohua set off from places A and B at the same time and walk towards each other. They can meet each other in 10 hours. If they both travel 5 kilometers per hour, they will meet after 8 hours. How many kilometers are the distance between the two places?
小明和小华两人分别从甲、乙两地同时出发，相向而行，10小时可以相遇，如果两人每小时都多行5千米，那么8小时后相遇，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">5 * 80</gadget>
<output>400</output>

<result>400</result>