Xiaoming's bedroom covers an area of 16.5 square meters, and the floor is just covered with 66 floor tiles. What is the area of each floor tile in square decimeters?
小明家卧室的面积是16.5平方米，正好用66块地砖铺完地面．每块地砖的面积是多少平方分米？
<gadget id="calculator">16.5 / 66</gadget>
<output>0.25</output>

<gadget id="calculator">0.25 * 100</gadget>
<output>25</output>

<result>25</result>