cylindrical bucket, the height measured from the inside is 3 decimeters, the radius of the bottom is 1.5 decimeters, how many kilograms of water can it hold? (1 liter of water weighs 1 kg)
一个圆柱形水桶，从里面量高是3分米，底面半径是1.5分米，它可装水多少千克？(1升水重1千克)
<gadget id="calculator">1.5 ** 2</gadget>
<output>2.25</output>

<gadget id="calculator">3.14 * 2.25 * 3 * 1</gadget>
<output>21.195</output>

<result>21.195</result>