The inner diameter of a cylindrical water cup is 6 cm, and the height is 2.5 times the diameter. How many milliliters of water can this water cup hold? (1 ml of water in 1 cubic centimeter)
一个圆柱形水杯内直径是6cm，高是直径的2.5倍，这个水杯可以装多少毫升水？(1立方厘米装1毫升水)
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">6 * 2.5</gadget>
<output>15</output>

<gadget id="calculator">3.14 * 9 * 15</gadget>
<output>423.9</output>

<result>423.9</result>