matrix multiplication for vb.net

See more:

VB

please help me as early as possible to solve the problem of matrix multiplication

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
       ar1txt.Text = "2"
       ai1txt.Text = "3"
       ar2txt.Text = "4"
       ai2txt.Text = "5"
       ar3txt.Text = "6"
       ai3txt.Text = "7"
       ar4txt.Text = "8"
       ai4txt.Text = "9"


       br1txt.Text = "2"
       bi1txt.Text = "3"
       br2txt.Text = "4"
       bi2txt.Text = "5"
       br3txt.Text = "6"
       bi3txt.Text = "7"
       br4txt.Text = "8"
       bi4txt.Text = "9"


       Dim A(0 To 10, 0 To 10) As Double
       Dim B(0 To 10, 0 To 10) As Double
       Dim Product(0 To 10, 0 To 10) As Double
       Dim J As Integer
       Dim K As Integer
       Dim X As Integer
       For J = 0 To 10
           For K = 0 To 10
               Product(J, K) = A(J, X) * B(X, K)
               For X = 1 To 10
                   Product(J, K) = Product(J, K) + A(J, X) * B(X, K)
               Next X
           Next K
       Next J
       ans1txt.Text = Product(J, K)
       ans2txt.Text = Product(J, K)
       ans3txt.Text = Product(J, K)
       ans4txt.Text = Product(J, K)

   End Sub

this is my code for matrix multiplication
but getting error as "Index was outside the bounds of the array"
please tell me where its getting wrong