A school conducts gymnastics training. If there are 28 people in each row, then the last row has 11 people; if there are 22 people in each row, then the last row is 27 people. What is the minimum number of people in this school?
某校进行体操训练，如果每行排28人，则最后一行是11人；如果每行排22人，则最后一行是27人，这个学校至少多少人．
<gadget id="calculator">28 * 10</gadget>
<output>280</output>

<gadget id="calculator">280 + 11</gadget>
<output>291</output>

<result>291</result>