We divide 81881954 by 521
The aim is to understand the frequency of 521 in 81881954.

Advancing to step 1:
When dividing 8 by 521, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 521

Let's proceed to step 2:
521 can be fit into 81 0 times, resulting in a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Take the next digit (8) from the dividend and append it to 81, then repeat: 818 / 521

Advancing to step 3:
The number 521 fits into 818 1 times, leaving a remainder of 297.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 521 from 818, we get 297.
Fetch the next digit (8) from the dividend, attach it to 297 and continue: 2978 / 521

Let's proceed to step 4:
2978 divided by 521 is 5 with a remainder of 373.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
The remainder is 373 after subtracting 2605 from 2978.
Grab the next digit (1) from the dividend, add it to 373, then carry on: 3731 / 521

Moving on to step 5:
3731 divided by 521 is 7 with a remainder of 84.
The next digit of our result is 7. 
Result so far: 157.0
The remainder is 84 after subtracting 3647 from 3731.
Bring next digit (9) of the dividend behind the 84 and repeat the process: 849 / 521

Let's proceed to step 6:
521 can be fit into 849 1 times, resulting in a remainder of 328.
Write down 1 as next digit of the result. 
Result so far: 1571.0
If we subtract 521 from 849, we get 328.
Append the next digit (5) from the dividend to 328 and continue with: 3285 / 521

Step 7:
521 goes into 3285 6 times with a remainder of 159.
The number 6 becomes the next digit in our result. 
Result so far: 15716.0
Subtract 3126 from 3285 to get 159.
Take the next digit (4) from the dividend and append it to 159, then repeat: 1594 / 521

Going ahead to step 8:
The number 521 fits into 1594 3 times, leaving a remainder of 31.
Record the quotient 3 as the next digit in the result. 
Result so far: 157163.0
The remainder is 31 after subtracting 1563 from 1594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 9:
If we divide 310 by 521, we get 0 and a remainder of 310.
Use 0 as the next digit of our solution. 
Result so far: 157163.0
The remainder is 310 after subtracting 0 from 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Step 10:
3100 divided by 521 is 5 with a remainder of 495.
The next digit of our result is 5. 
Result so far: 157163.05
Subtract 2605 from 3100 to get 495.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4950, and continue the process.

Let's proceed to step 11:
The number 521 fits into 4950 9 times, leaving a remainder of 261.
Record the quotient 9 as the next digit in the result. 
Result so far: 157163.059
If we subtract 4689 from 4950, we get 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Going ahead to step 12:
The number 521 fits into 2610 5 times, leaving a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 157163.0595
If we subtract 2605 from 2610, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 13:
50 divided by 521 is 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 157163.0595
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 14:
521 can be fit into 500 0 times, resulting in a remainder of 500.
Put 0 as the next digit of the answer. 
Result so far: 157163.0595
The remainder is 500 after subtracting 0 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

The quotient of the division is 157163.0595, and the remainder is 5e-05.