A reception room is 8 meters long, 6 meters wide, and 4 meters high, with doors and windows covering a total area of 25 square meters. It is estimated that it will cost 25 yuan per square meter to decorate the walls and ceiling of the reception room. How much is the estimated total cost?
一件接待室长8米，宽6米，高4米，门窗面积共25平方米，要将接待室四壁和顶棚装饰起来，预计每平方米花费25元，预计一共花费多少元？
<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<gadget id="calculator">8 * 4 * 2</gadget>
<output>64</output>

<gadget id="calculator">6 * 4 * 2</gadget>
<output>48</output>

<gadget id="calculator">48 - 25</gadget>
<output>23</output>

<gadget id="calculator">48 + 64 + 23</gadget>
<output>135</output>

<gadget id="calculator">135 * 25</gadget>
<output>3_375</output>

<result>3_375</result>