A square vegetable plot has the same perimeter as a rectangular vegetable plot. The side length of the square vegetable plot is 40 meters, and the length of the rectangular vegetable plot is 60 meters. What is the width of the rectangular vegetable plot in meters?
一块正方形菜地与一块长方形菜地的周长相等，正方形菜地边长40米，长方形菜地长60米，长方形菜地宽是多少米？
<gadget id="calculator">40 * 4</gadget>
<output>160</output>

<gadget id="calculator">160 / 2</gadget>
<output>80</output>

<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<result>20</result>