How many subordinates does employee ID 2 have and what is the biggest order in terms of value that his/her subordinates have created?
subordinates of employee ID 2 refers to EmployeeID where ReportsTo = 2;  biggest order in terms of value refers to max(MULTIPLY(Quantity, UnitPrice))
SELECT COUNT(T1.EmployeeID), SUM(T3.Quantity * T3.UnitPrice) FROM Employees AS T1 INNER JOIN Orders AS T2 ON T1.EmployeeID = T2.EmployeeID INNER JOIN `Order Details` AS T3 ON T2.OrderID = T3.OrderID WHERE T1.ReportsTo = 2 ORDER BY SUM(T3.UnitPrice * T3.Quantity) DESC LIMIT 1