If a square of paper is folded in half once, the perimeter is 6 cm. What is the actual perimeter of the square?
一张正方形的纸对折一次后，周长是6厘米，这个正方形的实际周长是多少．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">6 / (3/4)</gadget>
<output>8</output>

<result>8</result>