There is a cone-shaped pile of sand, the radius of the base is 10 meters, the height is 3 meters, and the weight of sand per cubic meter is 1.5 tons. What is the mass of this pile of sand?
有一堆圆锥形的沙子，底面半径10米，高3米，每立方米沙子重1.5吨．这堆沙子的质量是多少吨？
<gadget id="calculator">3 / 3</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 10 * 10 * 1</gadget>
<output>314</output>

<gadget id="calculator">1.5 * 314</gadget>
<output>471</output>

<result>471</result>