The fourth grade students donated money to the children in Japan's disaster-stricken areas. Class 4 (1) donated 460 yuan, and class 4 (2) donated 280 yuan less than class 4 (1). How much is the donation for Class 4 (2)?
四年级同学为日本灾区小朋友捐款，四(一)班捐了460元，四(二)班比四(一)班的2倍少280元．四(二)班捐款多少元？
<gadget id="calculator">460 * 2</gadget>
<output>920</output>

<gadget id="calculator">920 - 280</gadget>
<output>640</output>

<result>640</result>