A car drives from place A to place B, and travels halfway and 20 kilometers. At this time, the distance traveled is the distance traveled (4/5). How many kilometers are there between places A and B?
一辆汽车从甲地开向乙地，走了全程的一半又20千米，这时，未走的路程是已走路程的(4/5)，甲乙两地相距多少千米？
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/9) - (1/2)</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">20 / (1/18)</gadget>
<output>360</output>

<result>360</result>