The perimeter of a rectangle is 120 cm and the ratio of length to width is 5:3. Find the area of the rectangle.
一个长方形的周长是120厘米，长与宽的比是5：3．求长方形的面积．
<gadget id="calculator">120 / 2</gadget>
<output>60</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">60 * (5/8) * 60 * (3/8)</gadget>
<output>3_375/4 = around 843.75</output>

<result>3_375/4 = around 843.75</result>