A cylinder has a base radius of 3 cm and a surface area of 150.72 cm2. Find the volume of the cylinder. (π takes 3.14)
一个圆柱体底面半径是3厘米，表面积是150.72平方厘米．求圆柱体体积．(π取3.14)
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2</gadget>
<output>56.52</output>

<gadget id="calculator">150.72 - 56.52</gadget>
<output>94.2</output>

<gadget id="calculator">2 * 3.14 * 3</gadget>
<output>18.84</output>

<gadget id="calculator">94.2 / 18.84</gadget>
<output>5</output>

<gadget id="calculator">3.14 * 9 * 5</gadget>
<output>141.3</output>

<result>141.3</result>