From City A to City B, the whole journey (2/5) has been done, and there are still 80 kilometers to the end. How many miles is it from city A to city B?
从甲城到乙城，行了全程的(2/5)，离终点还有80千米．甲城到乙城一共有多少千米？
<gadget id="calculator">2 / 5</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">80 / (3/5)</gadget>
<output>400/3 = around 133.333333</output>

<result>400/3 = around 133.333333</result>