It takes 5 hours for an express train to go from station A to station B, and it takes 8 hours for a slow train to travel from station B to station A. Now the two cars are going towards each other at the same time. The slow train is repaired for 2 hours due to an accident on the way, so the fast train travels 84,000 more than the slow train when they meet. rice. Find the distance between A and B.
一列快车从甲站到乙站要5小时，一列慢车从乙站到甲站要8小时，现两车同时相向而行，途中慢车因事故修理2小时，所以相遇时快车比慢车多行84千米．求甲、乙两地距离．
<gadget id="calculator">84 * 2</gadget>
<output>168</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/5) + (1/8)</gadget>
<output>13/40 = around 0.325</output>

<gadget id="calculator">(3/5) / (13/40)</gadget>
<output>24/13 = around 1.846154</output>

<gadget id="calculator">2 + (24/13)</gadget>
<output>50/13 = around 3.846154</output>

<gadget id="calculator">(50/13) * (1/5)</gadget>
<output>10/13 = around 0.769231</output>

<gadget id="calculator">(1/8) * (24/13)</gadget>
<output>3/13 = around 0.230769</output>

<gadget id="calculator">(10/13) - (3/13)</gadget>
<output>7/13 = around 0.538462</output>

<gadget id="calculator">168 / (7/13)</gadget>
<output>312</output>

<result>312</result>