A car has traveled the entire distance (2/5) from place A to place B, and there is still 80 kilometers away from the midpoint. How many kilometers are there between places A and B?
一辆汽车从甲地开往乙地，已行了全程的(2/5)，离中点还有80千米，甲乙两地相距多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

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

<result>800</result>