If the length of a rectangle is a cm and the width is long (2/3), what is the width of the rectangle?
如果一个长方形的长为a厘米，宽是长的(2/3)，则长方形的宽为多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>