From point A to point B, it takes 90 minutes by truck and 80 minutes by bus. The truck travels (1/2) kilometers per minute, how many kilometers per minute does the passenger car travel?
从A地去B地，货车需要90分钟，客车需要80分钟．货车每分钟行(1/2)千米，客车每分钟行多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 80</gadget>
<output>1/160 = around 0.00625</output>

<gadget id="calculator">90 * (1/160)</gadget>
<output>9/16 = around 0.5625</output>

<result>9/16 = around 0.5625</result>