Two people, A and B, start from the east city to the west city at the same time. A travels 30 kilometers per hour, and B travels 50 kilometers per hour. A is 8 hours later than B. How many kilometers are the distance between the two cities?
甲乙两人同时从东城向西城出发，甲每小时行30千米，乙每小时行50千米，甲比乙迟到8小时．两城相距多少千米．
<gadget id="calculator">30 / 50</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / (3/5)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">(5/3) - 1</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">8 / (2/3)</gadget>
<output>12</output>

<gadget id="calculator">50 * 12</gadget>
<output>600</output>

<result>600</result>