Wang Gang rode a bicycle from home to school, which usually took only 20 minutes. Because there were 2 kilometers of road construction on the way, he had to push the cart and walk. The walking speed is 1/3 of the cycling speed, but it took 36 minutes to get to the school that day. How many kilometers is it from Wang Gang's home to the school?
王刚骑自行车从家到学校去，平常只用20分钟，因途中有2千米正在修路，只好推车步行．步行速度是骑车速度的(1/3)，结果这天用了36分钟才到学校，王刚家到学校有多少千米？
<gadget id="calculator">36 - 20</gadget>
<output>16</output>

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

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) * 20</gadget>
<output>5</output>

<result>5</result>