For p As Integer = 0 To size - 1 For q As Integer = 0 To size - 1 For r As Integer = 0 To size - 1 matrixP(q, p) = matrixP(q, p) + (matrixA(r, p) * matrixB(q, r)) strP = strP & matrixP(q, p) & " " Next Next strP = strP & Environment.NewLine Next