How many tiles are needed to lay tiles in a cuboid reservoir with a length of 20 meters, a width of 8 meters, and a depth of 1.5 meters. The tiles are squares with a side length of 0.5 meters? (Affix all around and on the bottom)
在一个长20米，宽8米，深1.5米的长方体蓄水池里贴瓷砖，瓷砖是边长为0.5米的正方形，至少需要瓷砖多少块？(四周和底面都要贴)
<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">0.5 * 0.5</gadget>
<output>0.25</output>

<gadget id="calculator">244 / 0.25</gadget>
<output>976</output>

<result>976</result>