We divide 81813381 by 561
The aim is to understand the frequency of 561 in 81813381.

Let's proceed to step 1:
561 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 561

Step 2:
When dividing 81 by 561, we get 0 with a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Append the next digit (8) from the dividend to 81 and continue with: 818 / 561

Going ahead to step 3:
561 goes into 818 1 times with a remainder of 257.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 561 away from 818, we end up with 257.
Include the next digit (1) from the dividend after 257, then repeat: 2571 / 561

Going ahead to step 4:
If we divide 2571 by 561, we get 4 and a remainder of 327.
The next digit of our result is 4. 
Result so far: 14.0
Deduct 2244 from 2571 and we're left with 327.
Grab the next digit (3) from the dividend, add it to 327, then carry on: 3273 / 561

Advancing to step 5:
When dividing 3273 by 561, we get 5 with a remainder of 468.
The number 5 becomes the next digit in our result. 
Result so far: 145.0
The remainder is 468 after subtracting 2805 from 3273.
Append the next digit (3) from the dividend to 468 and continue with: 4683 / 561

Step 6:
If we divide 4683 by 561, we get 8 and a remainder of 195.
Use 8 as the next digit of our solution. 
Result so far: 1458.0
Subtract 4488 from 4683 to get 195.
Fetch the next digit (8) from the dividend, attach it to 195 and continue: 1958 / 561

Step 7:
561 goes into 1958 3 times with a remainder of 275.
The next digit of our result is 3. 
Result so far: 14583.0
Subtracting 1683 from 1958 leaves us with 275.
Fetch the next digit (1) from the dividend, attach it to 275 and continue: 2751 / 561

On to step 8:
561 goes into 2751 4 times with a remainder of 507.
The number 4 becomes the next digit in our result. 
Result so far: 145834.0
If we take 2244 away from 2751, we end up with 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

On to step 9:
When dividing 5070 by 561, we get 9 with a remainder of 21.
Record the quotient 9 as the next digit in the result. 
Result so far: 145834.9
Subtracting 5049 from 5070 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 10:
561 can be fit into 210 0 times, resulting in a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 145834.9
The remainder is 210 after subtracting 0 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 11:
The number 561 fits into 2100 3 times, leaving a remainder of 417.
Use 3 as the next digit of our solution. 
Result so far: 145834.903
If we take 1683 away from 2100, we end up with 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

Step 12:
If we divide 4170 by 561, we get 7 and a remainder of 243.
Put 7 as the next digit of the answer. 
Result so far: 145834.9037
If we subtract 3927 from 4170, we get 243.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2430, and continue the process.

Going ahead to step 13:
The number 561 fits into 2430 4 times, leaving a remainder of 186.
Record the quotient 4 as the next digit in the result. 
Result so far: 145834.90374
If we subtract 2244 from 2430, we get 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

On to step 14:
The number 561 fits into 1860 3 times, leaving a remainder of 177.
The next digit of our result is 3. 
Result so far: 145834.903743
Subtract 1683 from 1860 to get 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Step 15:
When dividing 1770 by 561, we get 3 with a remainder of 87.
The number 3 becomes the next digit in our result. 
Result so far: 145834.9037433
Subtract 1683 from 1770 to get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Our division results in 145834.9037433 with a remaining 8.7e-07.