A conical sand pile has a bottom area of 12.56 square meters and a height of 3 meters. Use this pile of sand to pave a road with a width of 5 meters to a thickness of 4 cm. How far can it be paved?
一个圆锥形沙堆，底面积是12.56平方米，高3米．用这堆沙子在宽5米的公路上铺4厘米厚，可以铺多远？
<gadget id="calculator">12.56 * 3</gadget>
<output>37.68</output>

<gadget id="calculator">37.68 / 3</gadget>
<output>12.56</output>

<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">12.56 / (1/25) / 5</gadget>
<output>62.8</output>

<result>62.8</result>