scala> def multiply(x: Int, y: Int) = x * y
multiply: (x: Int, y: Int)Int

scala> def multiplyCurried = (multiply _).curried
multiplyCurried: Int => (Int => Int)

<console>:10: error: missing parameter type
              multiplyCurried(a => b => a * b)

def multiply(x: Int, y: Int) = x * y          //> multiply: (x: Int, y: Int)Int

def multiplyCurried = (multiply _).curried    //> multiplyCurried: => Int => (Int => Int)

def multiplyCurried2(x: Int)(y: Int) = x * y  //> multiplyCurried2: (x: Int)(y: Int)Int

multiply(1, 2)                                //> res1: Int = 2
multiplyCurried(1)(2)                         //> res2: Int = 2
multiplyCurried2(1)(2)                        //> res3: Int = 2