In order to support the students of the disaster-stricken schools in Ya'an, the school launched a book donation activity. The fourth grade donated 120 books, the fifth grade donated 15 books three times less than the fourth grade, and the sixth grade donated 40 more books than the fifth grade. How many books are donated for the sixth grade?
为支持雅安受灾学校的学生，学校开展了爱心捐书活动．四年级捐120本，五年级捐的是四年级的3倍少15本，六年级比五年级多捐40本．六年级捐书多少本？
<gadget id="calculator">120 * 3</gadget>
<output>360</output>

<gadget id="calculator">360 - 15</gadget>
<output>345</output>

<gadget id="calculator">345 + 40</gadget>
<output>385</output>

<result>385</result>