Obviously use a rubber band to enclose a rectangle with a perimeter of 16 cm on the nail board. The length of this rectangle is 5 cm, and what is the width in cm?
明明用一根皮筋在钉子板上围出了一个周长是16厘米的长方形，这个长方形的长是5厘米，宽是多少厘米．
<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">16 - 10</gadget>
<output>6</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<result>3</result>