Hongxing Primary School graduated 280 students last year, and the number of students graduating this year is 15% more than last year. How many students are graduating this year?
红星小学去年毕业280人，今年毕业的学生比去年多15%．今年毕业学生多少人？
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">280 * (23/20)</gadget>
<output>322</output>

<result>322</result>