If 5 identical cubes are glued together to form a cuboid, the surface area of this cuboid is equal to the surface area of the original 5 cubes.
用5个相同的正方体粘合成一个长方体，这个长方体的表面积是原来五个正方体表面积的多少．
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">30 - 8</gadget>
<output>22</output>

<gadget id="calculator">22 / 30</gadget>
<output>11/15 = around 0.733333</output>

<result>11/15 = around 0.733333</result>