Guangming Primary School donated books to students in mountainous areas. The fourth grade donated 240 books, and the fifth grade donated twice that of the fourth grade. How many books were donated by the fourth and fifth grades?
光明小学为山区同学捐书，四年级捐240本，五年级捐的是四年级的2倍，四年级和五年级共捐多少本？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">240 * 3</gadget>
<output>720</output>

<result>720</result>