piece of paper is 0.1 cm thick. Fold it in half and then in half. If you fold it in half three times, what is the thickness of the paper in cm?
一张纸厚0.1厘米，将它对折再对折，如果对折三次后，这时纸厚为多少厘米
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

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

<result>0.8</result>