We divide 81397147 by 51
The aim is to understand the frequency of 51 in 81397147.

On to step 1:
51 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
Subtract 0 from 8 to get 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 51

Advancing to step 2:
51 can be fit into 81 1 times, resulting in a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 51 from 81 and we're left with 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 51

Going ahead to step 3:
If we divide 303 by 51, we get 5 and a remainder of 48.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 48 after subtracting 255 from 303.
Append the next digit (9) from the dividend to 48 and continue with: 489 / 51

On to step 4:
When dividing 489 by 51, we get 9 with a remainder of 30.
Write down 9 as next digit of the result. 
Result so far: 159.0
If we subtract 459 from 489, we get 30.
Take the next digit (7) from the dividend and append it to 30, then repeat: 307 / 51

Let's proceed to step 5:
If we divide 307 by 51, we get 6 and a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 1596.0
If we subtract 306 from 307, we get 1.
Grab the next digit (1) from the dividend, add it to 1, then carry on: 11 / 51

Moving on to step 6:
When dividing 11 by 51, we get 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 15960.0
If we take 0 away from 11, we end up with 11.
Append the next digit (4) from the dividend to 11 and continue with: 114 / 51

Advancing to step 7:
The number 51 fits into 114 2 times, leaving a remainder of 12.
The next digit of our result is 2. 
Result so far: 159602.0
If we take 102 away from 114, we end up with 12.
Grab the next digit (7) from the dividend, add it to 12, then carry on: 127 / 51

On to step 8:
51 can be fit into 127 2 times, resulting in a remainder of 25.
The number 2 becomes the next digit in our result. 
Result so far: 1596022.0
If we subtract 102 from 127, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 9:
51 can be fit into 250 4 times, resulting in a remainder of 46.
The next digit of our result is 4. 
Result so far: 1596022.4
If we take 204 away from 250, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 10:
51 goes into 460 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 1596022.49
The remainder is 1 after subtracting 459 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 11:
If we divide 10 by 51, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 1596022.49
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 12:
The number 51 fits into 100 1 times, leaving a remainder of 49.
Record the quotient 1 as the next digit in the result. 
Result so far: 1596022.4901
If we subtract 51 from 100, we get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Let's proceed to step 13:
If we divide 490 by 51, we get 9 and a remainder of 31.
Put 9 as the next digit of the answer. 
Result so far: 1596022.49019
Subtracting 459 from 490 leaves us with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Moving on to step 14:
51 can be fit into 310 6 times, resulting in a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 1596022.490196
Subtract 306 from 310 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 15:
51 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 1596022.490196
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 16:
51 can be fit into 400 7 times, resulting in a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 1596022.49019607
Subtract 357 from 400 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Our division results in 1596022.49019607 with a remaining 4.3e-08.