For a rectangle, if its length increases by 2 cm and its width increases by 4 cm, then its area increases by 52 square centimeters, which is exactly a square. What is the area of the original rectangle in square centimeters?
一个长方形，如果长增加2厘米，宽增加4厘米，那么面积就增加52平方厘米，这时恰好是一个正方形．原来长方形的面积是多少平方厘米．
<gadget id="calculator">10 - 2</gadget>
<output>8</output>

<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">8 * 6</gadget>
<output>48</output>

<result>48</result>