89102151 ÷ 128 
We want to divide 89102151 by 128.

On to step 1:
128 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 128

Going ahead to step 2:
The number 128 fits into 89 0 times, leaving a remainder of 89.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 89, we end up with 89.
Grab the next digit (1) from the dividend, add it to 89, then carry on: 891 / 128

Moving on to step 3:
When dividing 891 by 128, we get 6 with a remainder of 123.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 768 from 891 leaves us with 123.
Bring next digit (0) of the dividend behind the 123 and repeat the process: 1230 / 128

On to step 4:
1230 divided by 128 is 9 with a remainder of 78.
Use 9 as the next digit of our solution. 
Result so far: 69.0
Subtracting 1152 from 1230 leaves us with 78.
Fetch the next digit (2) from the dividend, attach it to 78 and continue: 782 / 128

Advancing to step 5:
128 goes into 782 6 times with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 696.0
Subtract 768 from 782 to get 14.
Append the next digit (1) from the dividend to 14 and continue with: 141 / 128

Going ahead to step 6:
If we divide 141 by 128, we get 1 and a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 6961.0
If we take 128 away from 141, we end up with 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 128

Moving on to step 7:
When dividing 135 by 128, we get 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 69611.0
Subtract 128 from 135 to get 7.
Bring next digit (1) of the dividend behind the 7 and repeat the process: 71 / 128

On to step 8:
128 can be fit into 71 0 times, resulting in a remainder of 71.
The number 0 becomes the next digit in our result. 
Result so far: 696110.0
Subtracting 0 from 71 leaves us with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 9:
The number 128 fits into 710 5 times, leaving a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 696110.5
Deduct 640 from 710 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 10:
When dividing 700 by 128, we get 5 with a remainder of 60.
Write down 5 as next digit of the result. 
Result so far: 696110.55
Deduct 640 from 700 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final outcome is 696110.55, with a leftover of 0.06.