cylinder whose base diameter is 10 centimeters, if its height increases by 3 centimeters, how many square centimeters does its surface area increase?
有一个圆柱底面直径是10厘米，如果高增加3厘米，那么它的表面积增加多少平方厘米．
<gadget id="calculator">3.14 * 10 * 3</gadget>
<output>94.2</output>

<result>94.2</result>