A conical sand pile has a base radius of 4 meters and a height of 9 meters. Each cubic meter of sand weighs about 4000 kilograms. How many kilograms does this pile of sand weigh? If you use this pile of sand to pave a road with a width of 6.28 meters and a thickness of 10 decimeters, how long can it be paved?
一个圆锥形沙堆，底面半径是4米，高9米，每立方米沙约重4000千克，这堆沙堆重多少千克？如果用这堆沙铺一条宽6.28米，厚10分米的路，可以铺多长？
<gadget id="calculator">10 / 10 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">10 / 10</gadget>
<output>1</output>

<gadget id="calculator">6.28 * 1</gadget>
<output>6.28</output>

<gadget id="calculator">9 / 6.28</gadget>
<output>1.433121</output>

<gadget id="calculator">(1/3) * 3.14 * 16 * 1.433121</gadget>
<output>24</output>

<result>24</result>