54504402 divided by 561 
The aim is to understand the frequency of 561 in 54504402.

Advancing to step 1:
The number 561 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 561

Going ahead to step 2:
If we divide 54 by 561, we get 0 and a remainder of 54.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Grab the next digit (5) from the dividend, add it to 54, then carry on: 545 / 561

Going ahead to step 3:
561 can be fit into 545 0 times, resulting in a remainder of 545.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 545, we get 545.
Include the next digit (0) from the dividend after 545, then repeat: 5450 / 561

Advancing to step 4:
If we divide 5450 by 561, we get 9 and a remainder of 401.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 5049 from 5450 to get 401.
Append the next digit (4) from the dividend to 401 and continue with: 4014 / 561

Let's proceed to step 5:
561 can be fit into 4014 7 times, resulting in a remainder of 87.
Use 7 as the next digit of our solution. 
Result so far: 97.0
Subtracting 3927 from 4014 leaves us with 87.
Take the next digit (4) from the dividend and append it to 87, then repeat: 874 / 561

Going ahead to step 6:
The number 561 fits into 874 1 times, leaving a remainder of 313.
Put 1 as the next digit of the answer. 
Result so far: 971.0
If we take 561 away from 874, we end up with 313.
Append the next digit (0) from the dividend to 313 and continue with: 3130 / 561

Moving on to step 7:
The number 561 fits into 3130 5 times, leaving a remainder of 325.
Record the quotient 5 as the next digit in the result. 
Result so far: 9715.0
Subtract 2805 from 3130 to get 325.
Append the next digit (2) from the dividend to 325 and continue with: 3252 / 561

Moving on to step 8:
The number 561 fits into 3252 5 times, leaving a remainder of 447.
Write down 5 as next digit of the result. 
Result so far: 97155.0
Deduct 2805 from 3252 and we're left with 447.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4470, and continue the process.

On to step 9:
If we divide 4470 by 561, we get 7 and a remainder of 543.
The next digit of our result is 7. 
Result so far: 97155.7
The remainder is 543 after subtracting 3927 from 4470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5430, and continue the process.

Advancing to step 10:
If we divide 5430 by 561, we get 9 and a remainder of 381.
Use 9 as the next digit of our solution. 
Result so far: 97155.79
Subtracting 5049 from 5430 leaves us with 381.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3810, and continue the process.

On to step 11:
3810 divided by 561 is 6 with a remainder of 444.
The next digit of our result is 6. 
Result so far: 97155.796
If we subtract 3366 from 3810, we get 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Step 12:
The number 561 fits into 4440 7 times, leaving a remainder of 513.
The next digit of our result is 7. 
Result so far: 97155.7967
Subtracting 3927 from 4440 leaves us with 513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

Step 13:
5130 divided by 561 is 9 with a remainder of 81.
The next digit of our result is 9. 
Result so far: 97155.79679
Subtract 5049 from 5130 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Moving on to step 14:
561 goes into 810 1 times with a remainder of 249.
Put 1 as the next digit of the answer. 
Result so far: 97155.796791
If we take 561 away from 810, we end up with 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

On to step 15:
561 goes into 2490 4 times with a remainder of 246.
Write down 4 as next digit of the result. 
Result so far: 97155.7967914
Subtracting 2244 from 2490 leaves us with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

On to step 16:
The number 561 fits into 2460 4 times, leaving a remainder of 216.
Record the quotient 4 as the next digit in the result. 
Result so far: 97155.79679144
Subtracting 2244 from 2460 leaves us with 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

The final result is 97155.79679144 with a remainder of 2.16e-07.