The surface area of a cuboid is 90 square centimeters. If it is just sawed into two equal cubes, how many square centimeters will the total surface area increase?
一根长方体木料的表面积是90平方厘米，正好把它锯成两个相等的正方体木块，这样表面积一共要增加多少平方厘米？
<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<gadget id="calculator">90 / 10</gadget>
<output>9</output>

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>