The surface area of a cube is 6 square meters. If the length of each side is increased by 1 meter, the volume will increase by how many cubic meters.
一个正方体的表面积是6平方米，如果把棱长各增加1米，体积就增加多少立方米．
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

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

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<result>7</result>