A rectangle is 6 cm long and 4 cm wide. If each side of the rectangle is enlarged by 5:1, what is the area of the enlarged rectangle in square centimeters?
一个长方形长6厘米、宽4厘米．把这个长方形的各边按5：1放大，放大后的长方形的面积是多少平方厘米．
<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<result>600</result>