The perimeter of a rectangle is 130 cm. If its width is increased (1/5) and its length is decreased (1/8), a new rectangle with the same perimeter is obtained. Find the area of the original rectangle.
一个长方形的周长是130厘米，如果它的宽增加(1/5)，长减少(1/8)，就得到一个相同周长的新长方形．求原长方形的面积．
<gadget id="calculator">130 / 2</gadget>
<output>65</output>

<gadget id="calculator">8 + 5</gadget>
<output>13</output>

<gadget id="calculator">130 / 2 / 13</gadget>
<output>5</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">65 - 40</gadget>
<output>25</output>

<gadget id="calculator">25 * 40</gadget>
<output>1_000</output>

<result>1_000</result>