For a rectangle, if the length is reduced by 5 cm and the width is reduced by 2 cm, then the area is reduced by 66 square centimeters, and the remaining part becomes exactly a square. Find the area of the original rectangle.
一个长方形，如果长减少5厘米，宽减少2厘米，那么面积就减少66平方厘米，这时剩下的部分恰好成为一个正方形．求原来长方形的面积．
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">66 - 10</gadget>
<output>56</output>

<gadget id="calculator">2 + 5</gadget>
<output>7</output>

<gadget id="calculator">56 / 7</gadget>
<output>8</output>

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

<gadget id="calculator">8 + 2</gadget>
<output>10</output>

<gadget id="calculator">13 * 10</gadget>
<output>130</output>

<result>130</result>