A conical pile of sand has a bottom area of 31.4 square meters and a height of 3 meters. If this pile of sand is used to pave a 0.02-meter-thick road on a 10-meter-wide road, how many meters can it be paved with?
一个圆锥形的沙堆，底面积是31.4平方米，高3米，用这堆沙在10米宽的公路上铺0.02米厚的路面，可以铺多少米长？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / 10 / 0.02</gadget>
<output>15</output>

<gadget id="calculator">(1/3) * 31.4 * 15</gadget>
<output>157</output>

<result>157</result>