There are two cylindrical cups, A and B. The radius of the bottom of cup A is 6 cm, and the radius of the bottom of cup B is half of that of cup A. There is no water in cup A, and the height of cup B is 10 cm. Now pour water from cup B to cup A so that the height of the water in the two cups is the same. How much water is in cup A at this time?
有甲、乙两只圆柱形杯子，甲杯底面半径是6cm，乙杯的底面半径是甲杯的一半，甲杯中没有水，乙杯中有水且高度是10cm．现在从乙杯往甲杯倒水，使两个杯中水的高度一样．问这时甲杯中有多少水？
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36 * 2</gadget>
<output>226.08</output>

<result>226.08</result>