For a square, if the side length is reduced by 5cm, the area will be reduced by 65cm**2. Find the perimeter of the original square.
一个正方形，边长减少5cm，则面积减少65cm**2．求原正方形的周长．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">65 + 25</gadget>
<output>90</output>

<gadget id="calculator">90 / 2 / 5</gadget>
<output>9</output>

<gadget id="calculator">9 * 4</gadget>
<output>36</output>

<result>36</result>