If you would like to know the following three numbers, you can do this using the following steps:
1, -5, 25, -125, x, y, z
1 * (-5) = -5
-5 * (-5) = 25
25 * (-5) = -125
x = -125 * (-5) = 625
y = 625 * (-5) = -3125
z = -3125 * (-5) = 15625
The correct result would be 625, -3125, and 15625.