A car travels from A to B in the morning for 1/5 of the full length and in the afternoon for 30% of the full length. I traveled 80 kilometers more in the afternoon than in the morning. How many kilometers is the distance from point A to point B?
一辆汽车从A地到B地，上午行了全长的(1/5)，下午行了全长的30%．下午比上午多行了80千米，A地到B地的路程有多少千米？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

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

<gadget id="calculator">(3/10) - (1/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 / (1/10)</gadget>
<output>800</output>

<result>800</result>