The railway station square is 75 meters long and 56 meters wide. A square flower bed with a side length of 12 meters is left in the middle, and the rest are covered with colored floor tiles. How many square meters are the colored floor tiles laid?
火车站广场长75米，宽56米．中间留下边长12米的正方形花坛，其余都铺彩色地砖．彩色地砖铺了多少平方米？
<gadget id="calculator">75 * 56</gadget>
<output>4_200</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<gadget id="calculator">4_200 - 144</gadget>
<output>4_056</output>

<result>4_056</result>