Xiaofen’s living room is paved with 80 square bricks with a side length of 5 decimeters. What is the area of Xiaofen’s living room in square meters?
小芬家的客厅里铺了80块边长为5分米的方砖，小芬家客厅的面积是多少平方米？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">5 * (1/20) * 80</gadget>
<output>20</output>

<result>20</result>