Of the 840 students in the school, 35 students participated in the Mathematical Olympiad. How many times are the number of students who did not participate?
全校840名同学有35名同学参加了奥林匹克数学竞赛，没有参加人数是参加人数的几倍？
<gadget id="calculator">840 - 35</gadget>
<output>805</output>

<gadget id="calculator">805 / 35</gadget>
<output>23</output>

<result>23</result>