The express train is going from A to B, and the slow train is going from B to A. The two cars start at the same time and run towards each other, and they meet on the way in 8 hours. Continue to drive forward for 2 hours after meeting. At this time, the express train is still 250 kilometers away from point B, and the slow train is still 350 kilometers away from point A. What is the distance between A and B in kilometers?
快车从甲地开往乙地，慢车从乙地开往甲地，两车同时出发相向而行，8小时在途中相遇．相遇后继续向前行驶2小时．这时，快车距乙地还有250千米，慢车距甲地还有350千米．甲、乙两地相距多少千米．
<gadget id="calculator">250 + 350</gadget>
<output>600</output>

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

<gadget id="calculator">(1/8) * 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">600 / (3/4)</gadget>
<output>800</output>

<result>800</result>