If a square with side length 4 cm is divided into four squares of the same size, what is the perimeter of each small square in cm?
把一个边长是4厘米的正方形分成四个同样大小的正方形，每个小正方形的周长是多少厘米厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<result>8</result>