Teacher Zhang’s house was decorated with 560 square bricks with an area of 9 square decimeters to just cover the floor of the living room. If the square bricks with a side length of 4 decimeters were used instead, how many square bricks would be needed?
张老师家装修房屋，用面积9平方分米的方砖560块正好铺满大客厅的地面，如果改用边长4分米的方砖，需要多少块？
<gadget id="calculator">9 * 560</gadget>
<output>5_040</output>

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

<gadget id="calculator">5_040 / 16</gadget>
<output>315</output>

<result>315</result>