There are two rectangles of different sizes. The large rectangle is (7/13) meters long and 1 meter wide. The small rectangle is (5/14) meters long and (7/13) meters wide. What is the difference in area between the big and small rectangles? ?
有两个大小不等的长方形，大长方形长(7/13)米，宽1米，小长方形长(5/14)米，宽(7/13)米，大小长方形面积之差是多少平方米？
<gadget id="calculator">7 / 13</gadget>
<output>7/13 = around 0.538462</output>

<gadget id="calculator">(7/13) * 1</gadget>
<output>7/13 = around 0.538462</output>

<gadget id="calculator">5 / 14</gadget>
<output>5/14 = around 0.357143</output>

<gadget id="calculator">(5/14) * (7/13)</gadget>
<output>5/26 = around 0.192308</output>

<gadget id="calculator">(7/13) - (5/26)</gadget>
<output>9/26 = around 0.346154</output>

<result>9/26 = around 0.346154</result>