The floor of Xiaogang's bedroom is 4 meters long and 3.5 meters wide, and the floor is paved with square bricks with an area of 0.25 square meters. How many square bricks are needed?
小刚的卧室地板长4米，宽3.5米，用面积0.25平方米的方砖铺地，需要多少块方砖？
<gadget id="calculator">3.5 / 0.25</gadget>
<output>14</output>

<gadget id="calculator">4 * 14</gadget>
<output>56</output>

<result>56</result>