A square iron box without a lid, with a side length of 1.5 decimeters, how many square decimeters of iron sheet should be used to make 100 such iron boxes?
一种正方体无盖铁盒，棱长1.5分米，做100个这样的铁盒至少要用多少平方分米铁皮？
<gadget id="calculator">1.5 * 1.5 * 5 * 100</gadget>
<output>1_125</output>

<result>1_125</result>