About 62.8 kilograms of waste cardboard boxes can be used to make 4 sofas in the London Carbon Pavilion of the World Expo. How many kilograms of waste cardboard are used on average for each sofa?
世博会伦敦碳馆内大约用62.8千克废纸箱就可以做成4个沙发．平均每个沙发用多少千克废纸箱？
<gadget id="calculator">62.8 / 4</gadget>
<output>15.7</output>

<result>15.7</result>