A cylinder and a cone have the same height. It is known that the volume ratio of the cone to the cylinder is (1/9). The area of the base of the cone is 7.2 square centimeters. What is the area of the base of the cylinder?
一个圆柱和一个圆锥高相等，已知圆锥与圆柱的体积比是(1/9)，圆锥底面积是7.2平方厘米，圆柱底面积是多少．
<gadget id="calculator">3 / 1</gadget>
<output>3</output>

<gadget id="calculator">7.2 * 3</gadget>
<output>21.6</output>

<result>21.6</result>