To determine the number of ways to divide 11 girls and 3 boys into 2 teams of 7, with each team including at least one boy, one can start by selecting one boy and then choosing six girls for that team. The number of combinations for selecting one boy from three is calculated, followed by the combinations for selecting six girls from eleven. These two results are then multiplied to find the total arrangements for one team. This process is repeated for the second team, ensuring that the conditions of the problem are met. The solution involves careful combinatorial calculations to account for the required team compositions.