Let's divide 66123799 by 128
We're looking to find how many times 128 goes into 66123799.

Advancing to step 1:
When dividing 6 by 128, we get 0 with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 128

Step 2:
128 can be fit into 66 0 times, resulting in a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Include the next digit (1) from the dividend after 66, then repeat: 661 / 128

Let's proceed to step 3:
128 goes into 661 5 times with a remainder of 21.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 640 from 661 leaves us with 21.
Include the next digit (2) from the dividend after 21, then repeat: 212 / 128

Advancing to step 4:
212 divided by 128 is 1 with a remainder of 84.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
Deduct 128 from 212 and we're left with 84.
Bring next digit (3) of the dividend behind the 84 and repeat the process: 843 / 128

Moving on to step 5:
When dividing 843 by 128, we get 6 with a remainder of 75.
Record the quotient 6 as the next digit in the result. 
Result so far: 516.0
The remainder is 75 after subtracting 768 from 843.
Include the next digit (7) from the dividend after 75, then repeat: 757 / 128

Step 6:
128 can be fit into 757 5 times, resulting in a remainder of 117.
The number 5 becomes the next digit in our result. 
Result so far: 5165.0
Deduct 640 from 757 and we're left with 117.
Take the next digit (9) from the dividend and append it to 117, then repeat: 1179 / 128

Advancing to step 7:
The number 128 fits into 1179 9 times, leaving a remainder of 27.
Use 9 as the next digit of our solution. 
Result so far: 51659.0
Subtract 1152 from 1179 to get 27.
Append the next digit (9) from the dividend to 27 and continue with: 279 / 128

Advancing to step 8:
The number 128 fits into 279 2 times, leaving a remainder of 23.
The next digit of our result is 2. 
Result so far: 516592.0
Deduct 256 from 279 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 9:
The number 128 fits into 230 1 times, leaving a remainder of 102.
The next digit of our result is 1. 
Result so far: 516592.1
Subtract 128 from 230 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 10:
1020 divided by 128 is 7 with a remainder of 124.
Use 7 as the next digit of our solution. 
Result so far: 516592.17
Deduct 896 from 1020 and we're left with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 11:
1240 divided by 128 is 9 with a remainder of 88.
Record the quotient 9 as the next digit in the result. 
Result so far: 516592.179
If we take 1152 away from 1240, we end up with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

On to step 12:
128 goes into 880 6 times with a remainder of 112.
Put 6 as the next digit of the answer. 
Result so far: 516592.1796
Subtract 768 from 880 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Advancing to step 13:
The number 128 fits into 1120 8 times, leaving a remainder of 96.
The next digit of our result is 8. 
Result so far: 516592.17968
If we take 1024 away from 1120, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Advancing to step 14:
960 divided by 128 is 7 with a remainder of 64.
Write down 7 as next digit of the result. 
Result so far: 516592.179687
Subtract 896 from 960 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 15:
If we divide 640 by 128, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 516592.1796875
Deduct 640 from 640 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 16:
0 divided by 128 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 516592.1796875
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 516592.1796875 and a remainder of 0.0.