Fold a square piece of paper with a side length of 16 cm in half and then fold in half again. What is the perimeter of each small rectangle in cm?
将一张边长16厘米的正方形纸片，对折再对折，每一个小长方形的周长是多少厘米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">16 * (1/4)</gadget>
<output>4</output>

<gadget id="calculator">16 + 4</gadget>
<output>20</output>

<gadget id="calculator">20 * 2</gadget>
<output>40</output>

<result>40</result>