The surface area of a cube with a lid is 5.4dm**2, what is its floor area dm**2?
一个正方体有盖纸盒的表面积是5.4dm**2，它的占地面积是多少dm**2．
<gadget id="calculator">5.4 / 6</gadget>
<output>0.9</output>

<result>0.9</result>