Master Li wants to make 60 cuboid ventilation pipes. The mouth of the nozzle is a square with side length 20cm, and the length of the pipe is 2m. How many square meters of iron sheets are needed in total?
李师傅要制作60根长方体通风管．管口是边长20cm的正方形，管长2m．一共需要多少平方米的铁皮？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 4 * 2 * 60</gadget>
<output>96</output>

<result>96</result>