The school lays square bricks on the floor of each classroom. To pave a classroom, if square bricks with an area of 9 square decimeters are used, 96 bricks are needed. If square bricks with a side length of 4 decimeters should be used, how many pieces are needed? (Solve with ratio)
学校给每间教室地面铺方砖．铺一间教室，如果用面积是9平方分米的方砖，需要96块．若该用边长4分米的方砖，需多少块？(用比例解决)
<gadget id="calculator">9 * 96</gadget>
<output>864</output>

<gadget id="calculator">4 * 4</gadget>
<output>16</output>

<gadget id="calculator">864 / 16</gadget>
<output>54</output>

<result>54</result>