A rectangle has the same perimeter as a square, and the ratio of the length to width of the rectangle is 5:3. Given that the area of the square is 4 square centimeters, what is the area of the rectangle?
一个长方形与一个正方形的周长相等，长方形的长与宽的比是5：3，已知正方形的面积是4平方厘米，则长方形的面积是多少．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 * 2 * 1 * (5/8) * 2 * 2 * 1 * (3/8)</gadget>
<output>15/4 = around 3.75</output>

<result>15/4 = around 3.75</result>