A and B play a game and get 1 point for winning a game, and -1 point for losing a game. Now A has 4 points and B -4 points. How many games can B win to tie the score?
甲乙两人做游戏赢一场可得1分，输一场得-1分，现在甲4分，乙-4分，乙在赢几场可以把比分追平？
<gadget id="calculator">4 - (-4)</gadget>
<output>8</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<result>4</result>