How many World Cup group matches are there?

The rules of the World Cup group match system are: 32 teams are divided into eight groups by drawing lots, and each group has four teams to play. Each team must play only one game against the other three teams, with four teams in each group playing round robin, and * * * playing six games (A1-A2; a 1-a3； a 1-a4； a2-a3； a2-a4； A3-a4), each game lasts for 90 minutes, and the winning, drawing and losing scores are 3, 1 and 0 respectively. The top two teams in each group advanced to the knockout 1/8 finals, and the *** 16 team was "top 16". Each group of four teams will be ranked according to the following rules: 1, with the team with the highest score ranking first. 2. The team with the highest goal difference ranks first. 3. The group with the highest total number of goals ranks first. If two or more teams are still tied according to the above rules, the ranking order will be determined by comparing them in the following order. For all teams except draws, the following rules are only made between draws. ) 4. Comparing the scores of several tied teams (that is, the relationship between the two teams), the winner ranks first. 5. Compare the goal difference of several tied teams. 6. Compare the total number of goals scored by several tied teams. 7. The score, goal difference, the relationship between victory and defeat and the total number of goals are all the same. This requires fair competition. The top two in each group qualify and enter the knockout stage. Rule of knockout: The team that scores more goals within 90 minutes (including stoppage time) of knockout wins. If both sides can't decide the winner within 90 minutes (including overtime), then the first half and the second half will play 15 minutes overtime respectively. In the overtime stage, if the two teams are still tied, it will be decided by the penalty of the players from both sides. In principle, the penalty kick is that each side kicks five balls. If it is still a draw, both sides will play a ball and the winner will win. If there is still no tie, the penalty will continue and both sides will kick another ball until the tie is broken. It can also be seen from here that in any case, everyone should tell the victory or defeat of football, because each World Cup is only prepared once.