There are 56 people in Class 6 of a certain school electing the monitor. The candidates are A, B, and C. The person with the most votes is elected. When accumulating in the middle, A gets 16 votes, B gets 13 votes, and C gets 9 votes. After that, how many votes must A have at least to ensure that he is elected.
某校六1班56人选举班长，候选人是甲、乙、丙三人，得票最多的人当选，中途累计时，甲得16票，乙得13票，丙得9票．此后，甲至少还要得多少票才能确保当选．
<gadget id="calculator">16 + 13 + 9</gadget>
<output>38</output>

<gadget id="calculator">56 - 38</gadget>
<output>18</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<result>8</result>