The swimming pool in the gymnasium is 100 meters long, 38 meters wide, and 2.5 meters deep. How many square meters are needed to tile the bottom and sides of the swimming pool?
体育馆的游泳池长100米，宽38米，深2.5米，要给这个游泳池底和四周贴瓷砖，需要多少平方米？
<gadget id="calculator">100 * 38</gadget>
<output>3_800</output>

<gadget id="calculator">100 * 2.5 * 2</gadget>
<output>500</output>

<gadget id="calculator">38 * 2.5 * 2</gadget>
<output>190</output>

<gadget id="calculator">3_800 + 500 + 190</gadget>
<output>4_490</output>

<result>4_490</result>