A conical sand pile has a bottom area of 37.68 square meters and a height of 5 meters. How many meters can be paved with a 2 cm thick road surface on a road 10 meters wide with this pile of sand?
一个圆锥形沙堆，底面积是37.68平方米，高是5米．用这堆沙灾10米宽的公路上铺2厘米厚的路面，能铺多少米？
<gadget id="calculator">5 / 10 / 0.2</gadget>
<output>2.5</output>

<gadget id="calculator">12.56 * 2.5</gadget>
<output>31.4</output>

<result>31.4</result>