The ratio of length to width of a rectangle is 8:5. If the length is reduced (1/7) and the width is increased by 13 centimeters, it becomes a square. What is the width of the original rectangle in centimeters?
一个长方形长与宽的比是8：5，如果将长减少(1/7)，宽增加13厘米，就变成一个正方形，原来长方形的宽是多少厘米？
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/7)</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">(8/5) * (6/7)</gadget>
<output>48/35 = around 1.371429</output>

<gadget id="calculator">(48/35) - 1</gadget>
<output>13/35 = around 0.371429</output>

<gadget id="calculator">13 / (13/35)</gadget>
<output>35</output>

<result>35</result>