Let's divide 81423871 by 607
The aim is to understand the frequency of 607 in 81423871.

Step 1:
When dividing 8 by 607, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
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 / 607

Step 2:
If we divide 81 by 607, we get 0 and a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Include the next digit (4) from the dividend after 81, then repeat: 814 / 607

Step 3:
607 goes into 814 1 times with a remainder of 207.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 607 from 814 to get 207.
Append the next digit (2) from the dividend to 207 and continue with: 2072 / 607

Moving on to step 4:
607 goes into 2072 3 times with a remainder of 251.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtracting 1821 from 2072 leaves us with 251.
Take the next digit (3) from the dividend and append it to 251, then repeat: 2513 / 607

Going ahead to step 5:
The number 607 fits into 2513 4 times, leaving a remainder of 85.
The number 4 becomes the next digit in our result. 
Result so far: 134.0
If we take 2428 away from 2513, we end up with 85.
Append the next digit (8) from the dividend to 85 and continue with: 858 / 607

On to step 6:
607 can be fit into 858 1 times, resulting in a remainder of 251.
Write down 1 as next digit of the result. 
Result so far: 1341.0
If we take 607 away from 858, we end up with 251.
Grab the next digit (7) from the dividend, add it to 251, then carry on: 2517 / 607

On to step 7:
When dividing 2517 by 607, we get 4 with a remainder of 89.
Use 4 as the next digit of our solution. 
Result so far: 13414.0
Subtract 2428 from 2517 to get 89.
Bring next digit (1) of the dividend behind the 89 and repeat the process: 891 / 607

Step 8:
607 goes into 891 1 times with a remainder of 284.
Record the quotient 1 as the next digit in the result. 
Result so far: 134141.0
If we subtract 607 from 891, we get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Moving on to step 9:
607 can be fit into 2840 4 times, resulting in a remainder of 412.
Record the quotient 4 as the next digit in the result. 
Result so far: 134141.4
Subtracting 2428 from 2840 leaves us with 412.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4120, and continue the process.

On to step 10:
If we divide 4120 by 607, we get 6 and a remainder of 478.
Write down 6 as next digit of the result. 
Result so far: 134141.46
Subtract 3642 from 4120 to get 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

Moving on to step 11:
607 can be fit into 4780 7 times, resulting in a remainder of 531.
Use 7 as the next digit of our solution. 
Result so far: 134141.467
The remainder is 531 after subtracting 4249 from 4780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Advancing to step 12:
607 goes into 5310 8 times with a remainder of 454.
Record the quotient 8 as the next digit in the result. 
Result so far: 134141.4678
Subtract 4856 from 5310 to get 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Moving on to step 13:
607 can be fit into 4540 7 times, resulting in a remainder of 291.
Write down 7 as next digit of the result. 
Result so far: 134141.46787
The remainder is 291 after subtracting 4249 from 4540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

Going ahead to step 14:
When dividing 2910 by 607, we get 4 with a remainder of 482.
Write down 4 as next digit of the result. 
Result so far: 134141.467874
If we take 2428 away from 2910, we end up with 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Moving on to step 15:
When dividing 4820 by 607, we get 7 with a remainder of 571.
Put 7 as the next digit of the answer. 
Result so far: 134141.4678747
The remainder is 571 after subtracting 4249 from 4820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5710, and continue the process.

Going ahead to step 16:
5710 divided by 607 is 9 with a remainder of 247.
Write down 9 as next digit of the result. 
Result so far: 134141.46787479
If we take 5463 away from 5710, we end up with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

After the division, we end up with 134141.46787479 and a remainder of 2.47e-07.