The side length of a cube is 6 cm. What is its surface area?
一个正方体的边长6厘米．它的表面积是多少？
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">36 * 6</gadget>
<output>216</output>

<result>216</result>