A cylindrical bucket without a lid has a bottom diameter of 20 cm and a height of 30 cm. If this bucket is used to hold water, how many kilograms can it hold? (Every liter of water weighs 1 kilogram, and keep the whole kilogram)
一个无盖的圆柱形水桶，底面直径20厘米，高30厘米，如果用这个水桶盛水，最多能盛多少千克？(每升水重1千克，得数保留整千克)
<gadget id="calculator">20 / 10</gadget>
<output>2</output>

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

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

<gadget id="calculator">30 / 10</gadget>
<output>3</output>

<gadget id="calculator">3.14 * 1 * 3 * 1</gadget>
<output>9.42</output>

<result>9.42</result>