In a cuboid swimming pool with a length of 20 meters, a width of 10 meters, and a depth of 2 meters, each tile is a square with a side length of 0.2 meters. How many such tiles are needed in total?
在一个长20米，宽10米，深2米的长方体游泳池内贴瓷砖，每块瓷砖是边长0.2米的正方形，一共需要多少块这样的瓷砖？
<gadget id="calculator">20 * 10</gadget>
<output>200</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">200 + 40 + 20</gadget>
<output>260</output>

<gadget id="calculator">260 * 2</gadget>
<output>520</output>

<gadget id="calculator">520 - 200</gadget>
<output>320</output>

<gadget id="calculator">0.2 * 0.2</gadget>
<output>0.04</output>

<gadget id="calculator">320 / 0.04</gadget>
<output>8_000</output>

<result>8_000</result>