The ratio of length to width of a rectangle is 5:3, if the length is 40 cm, what is the area?
一个长方形长和宽的比是5：3，若长是40厘米，那么面积是多少？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">40 * (3/5)</gadget>
<output>24</output>

<gadget id="calculator">40 * 24</gadget>
<output>960</output>

<result>960</result>