There is a rectangular piece of land with a length of 85 meters and a width of 40 meters. If the width is increased by 5 meters and the area remains the same, how many meters should the length be reduced?
有一块长方形地，长85米，宽40米，如果宽增加5米，要面积不变，长应该减少多少米？
<gadget id="calculator">40 + 5</gadget>
<output>45</output>

<gadget id="calculator">40 / 45</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">85 * (8/9)</gadget>
<output>680/9 = around 75.555556</output>

<gadget id="calculator">85 - (680/9)</gadget>
<output>85/9 = around 9.444444</output>

<result>85/9 = around 9.444444</result>