A swimming pool is 50 meters long, 25 meters wide and 2.5 meters deep. If tiles are to be pasted around and on its bottom, how many square meters of tiles need to be pasted in total?
一个游泳池长50米，宽25米，深2.5米．如果要在它的四周和底面贴上瓷砖，共需贴多少平方米的瓷砖？
<gadget id="calculator">50 * 25</gadget>
<output>1_250</output>

<gadget id="calculator">50 * 2.5 * 2</gadget>
<output>250</output>

<gadget id="calculator">25 * 2.5 * 2</gadget>
<output>125</output>

<gadget id="calculator">1_250 + 250 + 125</gadget>
<output>1_625</output>

<result>1_625</result>