A cuboid ventilation pipe is 1.5 meters long, and its cross section is a square with a side length of 12 centimeters. How many square decimeters of iron sheet are needed to make this ventilation pipe?
一个长方体通风管长1.5米，横截面是边长是12厘米的正方形，做这个通风管至少需要多少平方分米的铁皮？
<gadget id="calculator">12 / 10</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1.5 * 10</gadget>
<output>15</output>

<gadget id="calculator">(6/5) * 4 * 15</gadget>
<output>72</output>

<result>72</result>