If the company wants to make a cuboid chimney with 10 sections of 5 decimeters in length and 8 meters in height, how many square meters of material does it need?
公司要制作10节底面边长5分米，高8米的长方体烟囱，需要用材料多少平方米？
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 4 * 8 * 10</gadget>
<output>160</output>

<result>160</result>