Lay tiles in a cuboid reservoir with a length of 8 meters, a width of 5 meters, and a depth of 2 meters. The tiles used are squares with a side length of 2 decimeters. How many tiles are needed to finish this cistern?
在一个长8米、宽5米、深2米的长方体蓄水池里面贴瓷砖，所使用的瓷砖为边长2分米的正方形．贴完这个蓄水池共需瓷砖多少块？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">16 + 10</gadget>
<output>26</output>

<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<gadget id="calculator">40 + 52</gadget>
<output>92</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">92 * 25</gadget>
<output>2_300</output>

<result>2_300</result>