A conical gravel pile, the bottom diameter is 40 meters, and the height is 1.5 meters. Use this pile of gravel to pave a road 10 meters wide, and the thickness of the gravel is 10 cm. How many meters can these gravel pave?
一个圆锥形的碎石堆，底面直径是40米，高是1.5米．用这堆碎石去铺一条10米宽的公路，碎石的厚度是10厘米．这些碎石能铺路多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 ** 2</gadget>
<output>400</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">1.5 / 1</gadget>
<output>1.5</output>

<gadget id="calculator">(1/3) * 3.14 * 400 * 1.5</gadget>
<output>628</output>

<result>628</result>