If the edge length of a cube is doubled, how many times does its surface area have to be enlarged?
一个正方体的棱长扩大2倍，它的表面积要扩大多少倍
<gadget id="calculator">1 * 1 * 6</gadget>
<output>6</output>

<gadget id="calculator">2 * 2 * 6</gadget>
<output>24</output>

<gadget id="calculator">24 / 6</gadget>
<output>4</output>

<result>4</result>