The processing plant needs to process 80 rainwater pipes. The cross-section of each rainwater pipe is a square with a side length of 10 cm and a length of 2 meters. How many square meters of iron sheets are needed?
加工厂要加工80节雨水管，每节雨水管的横截面是边长10厘米的正方形，长度是2米，共需用铁皮多少平方米？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 4 * 2 * 80</gadget>
<output>64</output>

<result>64</result>