The perimeter of a rectangular vegetable field is 100 meters, and the length and width are twice as long. Find the area of this rectangular vegetable field.
一块长方形菜地的周长是100米，长时宽的二倍，求这块长方形菜地的面积．
<gadget id="calculator">100 / 3</gadget>
<output>100/3 = around 33.333333</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">50 / 3</gadget>
<output>50/3 = around 16.666667</output>

<gadget id="calculator">(100/3) * (50/3)</gadget>
<output>5_000/9 = around 555.555556</output>

<result>5_000/9 = around 555.555556</result>