When dividing 1600 by 4, you would just divide 16 by 4 and then add all the zeroes on at the end. The answer would be 400.
Any equation which does not require you to divide by four, or its equivalent. For example 1600 divided by 5. There is an infinity of such equations.
25
0.3175
2
1600
1600
1600
1600
That means divide 1600 by 100 and you get 16. 1600/100=16
183.908
533.3333
1600