A car drives from place A to place B. It travels 20% of the journey in the first hour, and 25% of the journey in the first hour. At this time, the distance from place A is exactly 180 kilometers. How far is the distance between A and B?
一辆汽车从甲地开往乙地，第一小时行了全程的20%，第一小时行了全程的25%，这时距离甲地正好180千米．甲乙两地相距多远．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/5) + (1/4)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">180 / (9/20)</gadget>
<output>400</output>

<result>400</result>