Uncle Wang used a 40-meter-long fence (not counting the joints) to form a rectangular vegetable field. It is known that the width of the vegetable field is long (1/4). How many square meters is the area of this vegetable field?
王大伯用40米长的篱笆(接头处不计)围成一块长方形菜地，已知菜地的宽是长的(1/4)，这块菜地面积是多少平方米？
<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>