The radius of the base of a cylinder is 10cm, the height is 10cm, what is its surface area in cm**2.
一个圆柱的底面半径是10cm，高是10cm，它的表面积是多少cm**2．
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">2 * 3.14 * 100</gadget>
<output>628</output>

<gadget id="calculator">628 + 628</gadget>
<output>1_256</output>

<result>1_256</result>