Hongda Company will make 6 cement casual small square tables. The length, width, and height of the small square table tops are 80cm, 80cm, and 5cm respectively, and the length, width, and height of the table legs are 6cm, 6cm, and 50cm respectively. To make these small square tables, at least How much concrete should be used? (Each small square table has 4 table legs)
宏达公司要做6个水泥休闲小方桌，小方桌桌面的长、宽、高分别是80cm，80cm，5cm，桌脚的长、宽、高分别是6cm、6cm，50cm，做这些小方桌至少要用多少方混凝土？(每个小方桌有4个桌脚)
<gadget id="calculator">0.8 * 0.8 * 0.05 * 100</gadget>
<output>3.2</output>

<gadget id="calculator">0.06 * 0.06 * 0.5 * 4 * 100</gadget>
<output>0.72</output>

<gadget id="calculator">3.2 + 0.72</gadget>
<output>3.92</output>

<result>3.92</result>