cuboid swimming pool, 50 meters long, 25 meters wide, 2 meters deep, and square white tiles with a length of 2 decimeters on the bottom and sides of the pool, how many pieces are used in total?
一个长方体游泳池，长50米，宽25米，深2米，池底和四周贴边长2分米的正方形白瓷砖，一共要用多少块？
<gadget id="calculator">50 * 25</gadget>
<output>1_250</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<gadget id="calculator">2 * 50</gadget>
<output>100</output>

<gadget id="calculator">1_250 + 50 + 100</gadget>
<output>1_400</output>

<gadget id="calculator">1_400 * 2</gadget>
<output>2_800</output>

<gadget id="calculator">2_800 - 1_250</gadget>
<output>1_550</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (1/5)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">1_550 / (1/25)</gadget>
<output>38_750</output>

<result>38_750</result>