Luckily for him and his clients, Thomas F. Villanti has a knack for mathematics.That’s because in his practice at Schiller DuCanto & Fleck LLP, Villanti is working on family law cases involving ultra wealthy individuals with marital estates that certainly meet the definition of wealthy.You might have heard of Villanti’s clients. The 36-year-old income partner has represented professional athletes from multiple teams — including players from the Chicago Bears, Bulls and Cubs — celebrity spouses …