The base of a cuboid is a square. If four such cuboids are superimposed, it is a large cube with a surface area of 486 square centimeters. Find the volume of each cuboid.
一个长方体的底面是正方形．如果将4个这样的长方体重叠起来，便是一个表面积为486平方厘米的大正方体．求每个长方体的体积．
<gadget id="calculator">9 / 4</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">9 * 9 * (9/4)</gadget>
<output>729/4 = around 182.25</output>

<result>729/4 = around 182.25</result>