If the length of a side of a cube is 1 cm, what is its surface area in square centimeters?
正方体的棱长是1厘米，它的表面积是多少平方厘米．
<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">1 * 6</gadget>
<output>6</output>

<result>6</result>