A swimming pool is 40m long, twice as wide, and 2.5m deep. How many square meters of tiles are needed to tile its sides and bottom?
一个游泳池，长40m，是宽的2倍，深2.5m．要在它的四周和底面贴瓷砖，需要多少平方米的瓷砖？
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">40 * 20</gadget>
<output>800</output>

<gadget id="calculator">40 * 2.5 * 2</gadget>
<output>200</output>

<gadget id="calculator">20 * 2.5 * 2</gadget>
<output>100</output>

<gadget id="calculator">800 + 200 + 100</gadget>
<output>1_100</output>

<result>1_100</result>