The worker uncle dug a swimming pool with a length of 25m, a width of 12m and a height of 2m. Now to paste tiles around and at the bottom of the swimming pool, at least how many square meters of tiles are needed?
工人叔叔挖了一个长是25m，宽是12m，高是2m的游泳池．现在要给用泳池的四周和底部都贴上瓷砖，至少需要多少平方米的瓷砖？
<gadget id="calculator">25 * 12</gadget>
<output>300</output>

<gadget id="calculator">25 * 2 * 2</gadget>
<output>100</output>

<gadget id="calculator">12 * 2 * 2</gadget>
<output>48</output>

<gadget id="calculator">300 + 100 + 48</gadget>
<output>448</output>

<result>448</result>