If 1 = 5, 2 = 25, 3 = 125, 4 = 625, what is 5 equal to?

If 1 = 5, 2 = 25, 3 = 125, 4 = 625, what is 5 equal to?

one
1=5,2=25,3=125,4=625
1 = 5, so 5 equals 1