conical sand pile has a bottom area of 28.26m**2 and a height of 2m. Use this pile of sand to pave a 2cm-thick road surface on a 20m-wide road. How many meters can you pave?
一个圆锥形沙堆，底面积是28.26m**2，高是2m．用这堆沙在20m宽的公路上铺2cm厚的路面，能铺多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">20 * (1/50)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 / (2/5)</gadget>
<output>5</output>

<gadget id="calculator">(1/3) * 28.26 * 5</gadget>
<output>47.1</output>

<result>47.1</result>