If a cube is cut into two identical cuboids, the surface area is increased by 36dm**2, what is the surface area of each cuboid after cutting?
把一个正方体切成两个完全一样的长方体，表面积增加36dm**2，切开后每个长方体的表面积是多少．
<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">54 + 18</gadget>
<output>72</output>

<result>72</result>