The area of a rectangle is 64 square decimeters, its width is 4 decimeters, and its length is how many decimeters.
一个长方形的面积是64平方分米，它的宽是4分米，长是多少分米．
<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<result>16</result>