Lay tiles on the bottom and surroundings of a cuboid reservoir with a length of 20m, a width of 8m, and a depth of 1.5m. The tiles are squares with a side length of 2dm. How many tiles are needed in total?
在一个长20m，宽8m，深1.5m的长方体蓄水池的底面和四周贴瓷砖，瓷砖是边长为2dm的正方形，共需瓷砖多少块？
<gadget id="calculator">20 * 8</gadget>
<output>160</output>

<gadget id="calculator">20 * 1.5 * 2</gadget>
<output>60</output>

<gadget id="calculator">8 * 1.5 * 2</gadget>
<output>24</output>

<gadget id="calculator">160 + 60 + 24</gadget>
<output>244</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">244 / (1/25)</gadget>
<output>6_100</output>

<result>6_100</result>