Construct a cuboid water tank with a length of 4 meters, a width of 3 meters and a depth of 2 meters. If the four walls and the bottom of the pool are to be pasted with square tiles with a side length of 2dm, how many pieces of such tiles should be used at least?
建造一个长方体蓄水池，内面长4米，宽3米，深2米．如果池的四壁和底面要贴上边长2dm的正方形瓷砖，至少要用这样的瓷砖多少块？
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">12 + 6 + 8</gadget>
<output>26</output>

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

<gadget id="calculator">52 - 12</gadget>
<output>40</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">40 / (1/25)</gadget>
<output>1_000</output>

<result>1_000</result>