If a rectangle is shortened by (1/5) and (1/6) one side, a square is obtained, by how much is the area of the square less than the area of the rectangle
一个长方形，一边缩短(1/5)，一边缩短(1/6)，得到一个正方形，正方形的面积比长方形的面积减少了多少
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / (5/6)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(5/4) * (6/5) * 1 * 1</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(5/4) * (6/5)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) / (3/2)</gadget>
<output>1</output>

<gadget id="calculator">1.5 - 1</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 / 1.5</gadget>
<output>0.333333</output>

<result>0.333333</result>