Make a cuboid basket with length, width, and height of 1.2 meters, 5 decimeters, and 40 centimeters, respectively. This box will occupy a minimum of square meters when placed indoors.
用铁皮做一个长、宽、高分别是1.2米、5分米、40厘米长方体筐子，这个箱子放在室内最少占地多少平方米．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/5) * (1/2)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>