There is a tin bucket with an inner radius of 4 decimeters and a height of 15 decimeters. There is a leak at the opening (1/5). How many kilograms of water can this tin bucket hold at most? (Weighs 1 kg per liter of water)
有一个铁皮水桶，内半径是4分米，高15分米，在离口(1/5)处有一个漏洞，这个铁皮水桶现在最多能装水多少千克？(每升水重1千克)
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 * 3.14 * 16 * 15 * (4/5)</gadget>
<output>602.88</output>

<result>602.88</result>