If a rectangle with a length of 5 cm and a width of 4 cm is enlarged by 5:1, what is the area of the figure in square centimeters?
将长为5厘米、宽4厘米的长方形按5：1放大，得到的图形面积是多少平方厘米
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">20 * 25</gadget>
<output>500</output>

<result>500</result>