There is a glass relief painting in the art gallery, which is spliced with 24 square glasses with a side length of 5 decimeters. Each piece is a separate painting, and 24 pieces of glass can form a complete painting. What is the perimeter of each glass in decimeters?
艺术长廊有一幅玻璃浮雕画，用24块边长5分米的正方形玻璃拼接而成，每一块单独成画，24块玻璃又能组成一幅完整的画．每块玻璃的周长是多少分米？
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<result>20</result>