The worker uncle is going to make a pair of cube water tanks without a cover, with a side length of 8 decimeters. At least how many square meters of iron sheet should be used?
工人叔叔要做一对无盖的正方体水箱，棱长为8分米．至少要用多少平方米的铁皮？
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">8 * 8 * 5 * (1/50)</gadget>
<output>32/5 = around 6.4</output>

<result>32/5 = around 6.4</result>