Mr. Wang can travel (5/2) kilometers in (1/3) hours. According to this calculation, how many hours does it take him to travel 1 kilometer?
王老师(1/3)小时行(5/2)千米，照这样计算，他行1千米需要多少小时．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(5/2) / (1/3)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">1 / (15/2)</gadget>
<output>2/15 = around 0.133333</output>

<result>2/15 = around 0.133333</result>