If the length of a rectangle is increased by 3 centimeters, the area will increase by 18 square centimeters; if the width is increased by 4 centimeters, the area will increase by 32 square centimeters. What is the area of this rectangle in square centimeters?
一个长方形，如果长增加3厘米，面积就会增加18平方厘米；如果宽增加4厘米，面积就会增加32平方厘米．这个长方形的面积是多少平方厘米？
<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<gadget id="calculator">32 / 4</gadget>
<output>8</output>

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

<result>48</result>