A piece of rectangular paper, the ratio of length to width is 5:3, cut out the largest square from this paper, the area of the remaining paper is 24 square centimeters, what is the area of the original rectangular paper in square centimeters?
一张长方形的纸，长与宽的比是5：3，从这张纸上剪去一个最大的正方形，剩余的纸片面积是24平方厘米，原来长方形纸的面积是多少平方厘米．
<gadget id="calculator">15 * 4</gadget>
<output>60</output>

<result>60</result>