A piece of paper is 1mm thick, fold it in half and then fold it in half again 4 times, what is the thickness in centimeters now?
一张纸厚1毫米，将它对折再对折共4次，现在的厚度是多少厘米．
<gadget id="calculator">2 ** 4</gadget>
<output>16</output>

<gadget id="calculator">16 / 10</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">1 * (8/5)</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>