A cylindrical bucket has a diameter of 4 decimeters measured from the inside, a height of 5 decimeters, and a weight of 1 kilogram per liter of water. How many kilograms of water can this bucket hold?
一个圆柱形水桶，从里面量得底面直径是4分米，高5分米，每升水重1千克，这个水桶能装水多少千克？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 5 * 1</gadget>
<output>62.8</output>

<result>62.8</result>