The area of a rectangle is 57 square centimeters, the width is 3 centimeters, what is its length in centimeters?
一个长方形的面积是57平方厘米，宽是3厘米，它的长是多少厘米．
<gadget id="calculator">57 / 3</gadget>
<output>19</output>

<result>19</result>