The perimeter of a rectangle is 40m and its width is 1/4 of its length. What is the area of this rectangle in square meters?
一个长方形的周长是40m，宽是长的(1/4)，那么这个长方形的面积是多少平方米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">40 / 2 / (5/4)</gadget>
<output>16</output>

<gadget id="calculator">16 * 16 * (1/4)</gadget>
<output>64</output>

<result>64</result>