51863776 divided by 891 
The aim is to understand the frequency of 891 in 51863776.

On to step 1:
When dividing 5 by 891, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 891

On to step 2:
51 divided by 891 is 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Include the next digit (8) from the dividend after 51, then repeat: 518 / 891

Moving on to step 3:
891 can be fit into 518 0 times, resulting in a remainder of 518.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 518 and we're left with 518.
Take the next digit (6) from the dividend and append it to 518, then repeat: 5186 / 891

Advancing to step 4:
When dividing 5186 by 891, we get 5 with a remainder of 731.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 4455 from 5186 leaves us with 731.
Bring next digit (3) of the dividend behind the 731 and repeat the process: 7313 / 891

Let's proceed to step 5:
If we divide 7313 by 891, we get 8 and a remainder of 185.
Put 8 as the next digit of the answer. 
Result so far: 58.0
If we subtract 7128 from 7313, we get 185.
Take the next digit (7) from the dividend and append it to 185, then repeat: 1857 / 891

Going ahead to step 6:
If we divide 1857 by 891, we get 2 and a remainder of 75.
Record the quotient 2 as the next digit in the result. 
Result so far: 582.0
Subtracting 1782 from 1857 leaves us with 75.
Grab the next digit (7) from the dividend, add it to 75, then carry on: 757 / 891

Going ahead to step 7:
The number 891 fits into 757 0 times, leaving a remainder of 757.
The next digit of our result is 0. 
Result so far: 5820.0
The remainder is 757 after subtracting 0 from 757.
Include the next digit (6) from the dividend after 757, then repeat: 7576 / 891

Moving on to step 8:
If we divide 7576 by 891, we get 8 and a remainder of 448.
The next digit of our result is 8. 
Result so far: 58208.0
The remainder is 448 after subtracting 7128 from 7576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Advancing to step 9:
If we divide 4480 by 891, we get 5 and a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 58208.5
The remainder is 25 after subtracting 4455 from 4480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 10:
When dividing 250 by 891, we get 0 with a remainder of 250.
Write down 0 as next digit of the result. 
Result so far: 58208.5
Deduct 0 from 250 and we're left with 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

Going ahead to step 11:
891 goes into 2500 2 times with a remainder of 718.
Put 2 as the next digit of the answer. 
Result so far: 58208.502
If we take 1782 away from 2500, we end up with 718.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7180, and continue the process.

Advancing to step 12:
891 can be fit into 7180 8 times, resulting in a remainder of 52.
The next digit of our result is 8. 
Result so far: 58208.5028
The remainder is 52 after subtracting 7128 from 7180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 13:
891 goes into 520 0 times with a remainder of 520.
The number 0 becomes the next digit in our result. 
Result so far: 58208.5028
Deduct 0 from 520 and we're left with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Going ahead to step 14:
891 can be fit into 5200 5 times, resulting in a remainder of 745.
Write down 5 as next digit of the result. 
Result so far: 58208.502805
The remainder is 745 after subtracting 4455 from 5200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7450, and continue the process.

Moving on to step 15:
7450 divided by 891 is 8 with a remainder of 322.
Put 8 as the next digit of the answer. 
Result so far: 58208.5028058
If we subtract 7128 from 7450, we get 322.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3220, and continue the process.

Going ahead to step 16:
The number 891 fits into 3220 3 times, leaving a remainder of 547.
The next digit of our result is 3. 
Result so far: 58208.50280583
The remainder is 547 after subtracting 2673 from 3220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5470, and continue the process.

The quotient of the division is 58208.50280583, and the remainder is 5.47e-07.