During the reading week activities organized by the school, the lower grade students read 409 books in total, and the senior grade students read 57 books three times more than the lower grade students. How many books did the senior grade students read in total?
在学校组织的读书周活动中，低年级同学共读了409本书，高年级同学读书的本数比低年级的3倍多57本，高年级同学共读了多少本？
<gadget id="calculator">409 * 3</gadget>
<output>1_227</output>

<gadget id="calculator">1_227 + 57</gadget>
<output>1_284</output>

<result>1_284</result>