Fold a piece of paper with a thickness of 0.1 mm in half, and fold it in half again, a total of 3 folds, what is the thickness of this paper in mm?
将厚0.1毫米的一张纸对折，再对折，共对折3次，这张纸厚多少毫米．
<gadget id="calculator">2 ** 3</gadget>
<output>8</output>

<gadget id="calculator">0.1 * 8</gadget>
<output>0.8</output>

<result>0.8</result>