If A=x1y1z1x2y287y33 is a matrix such that the sum of all three elements along any row, column or diagonal are equal to each other, then the value of determinant of A is ______

Question

If A=​x1​y1​z1​​x2​y2​8​7y3​3​​ is a matrix such that the sum of all three elements along any row, column or diagonal are equal to each other, then the value of determinant of A is ______