A conical pile of sand has a circumference of 6.28 meters and a height of 4.5 decimeters. How many meters can be paved with this pile of sand on a road 5 meters wide and 2 centimeters thick?
一个圆锥形沙堆，底面周长为6.28米，高4.5分米，用这堆沙在5米宽的公路上铺2厘米厚的路面，能铺多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

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

<gadget id="calculator">5 * (1/50)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">4.5 / 10 / (1/10)</gadget>
<output>4.5</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 4.5</gadget>
<output>4.71</output>

<result>4.71</result>