A piece of paper is (4/5) meters long, first cut off half of it, then cut off the remaining half..., cut 4 times, how long is the remaining part?
一根纸条长(4/5)米，先剪去它的一半，再剪下剩下的一半…，剪了4次，剩下的部分有多长？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/5) * (1/2) * (1/2) * (1/2) * (1/2)</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>