Two trains depart from A and B at the same time. The express train travels 80 kilometers per hour, and the slow train travels at 3/5 the speed of the express train. After 3 hours, the two trains meet. How many kilometers are there between A and B?
两列火车从甲、乙两地同时相对开出，快车每小时行80千米，慢车时速为快车的(3/5)，两车经过3小时相遇，甲、乙两地相距多少千米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">80 * (3/5)</gadget>
<output>48</output>

<gadget id="calculator">80 + 48</gadget>
<output>128</output>

<gadget id="calculator">128 * 3</gadget>
<output>384</output>

<result>384</result>