The new building in Guilin community needs 50 rectangular rainwater pipes. It is known that the cross section of the rainwater pipe is 10cm long, 8cm wide, and each section is 2m long. How many square meters of iron sheets are needed to make these rainwater pipes?
桂林小区新建大楼需50节长方形雨水管道，已知雨水管道横截面长10cm，宽8cm，每节长2m，做这些雨水管至少需要多少平方米铁皮？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">2 * (1/10)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">8 / 100</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">(2/25) * 2</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">(1/5) + (4/25)</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">(9/25) * 2 * 50</gadget>
<output>36</output>

<result>36</result>