48 young pioneers choose the captain. The candidates are A, B, and C. During the counting of votes, A gets 13 votes, B gets 10 votes, and C gets 7 votes. votes to be elected?
48名少先队员选中队长，候选人是甲、乙、丙三人，开票中途累计，甲得13票，乙得10票，丙得7票，得票最多的人当选，问以后甲至少再得多少票才能当选？
<gadget id="calculator">13 + 10 + 7</gadget>
<output>30</output>

<gadget id="calculator">48 - 30</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>