A conical pile of sand has a base radius of 1 meter and a height of 15 decimeters. How many meters can be paved with this pile of sand on a road with a width of 5 meters and a road surface of 2 mm?
一个圆锥形沙堆，底面半径是1米，高是15分米．用这堆沙在5米宽的公路上铺2毫米的路面，可以铺多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">(1/3) * 3.14 * 1 * 1.5</gadget>
<output>1.57</output>

<gadget id="calculator">5 * 0.002</gadget>
<output>0.01</output>

<gadget id="calculator">1.57 / 0.01</gadget>
<output>157</output>

<result>157</result>