A cylindrical tin bucket has a bottom radius of 1 decimeter and a height of 5 decimeters. How much water can this tin bucket hold at most?
一圆柱形的铁皮桶，底面半径是1分米，高是5分米，这个铁皮桶最多能装多少升水？
<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 5</gadget>
<output>15.7</output>

<result>15.7</result>