We divide 1003698 by 423
The aim is to understand the frequency of 423 in 1003698.

Step 1:
If we divide 1 by 423, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 423

Moving on to step 2:
The number 423 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 423

On to step 3:
423 goes into 100 0 times with a remainder of 100.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 100 to get 100.
Include the next digit (3) from the dividend after 100, then repeat: 1003 / 423

Moving on to step 4:
When dividing 1003 by 423, we get 2 with a remainder of 157.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 846 away from 1003, we end up with 157.
Bring next digit (6) of the dividend behind the 157 and repeat the process: 1576 / 423

Step 5:
423 goes into 1576 3 times with a remainder of 307.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
Deduct 1269 from 1576 and we're left with 307.
Grab the next digit (9) from the dividend, add it to 307, then carry on: 3079 / 423

On to step 6:
423 can be fit into 3079 7 times, resulting in a remainder of 118.
Put 7 as the next digit of the answer. 
Result so far: 237.0
Subtracting 2961 from 3079 leaves us with 118.
Grab the next digit (8) from the dividend, add it to 118, then carry on: 1188 / 423

Let's proceed to step 7:
1188 divided by 423 is 2 with a remainder of 342.
Use 2 as the next digit of our solution. 
Result so far: 2372.0
If we subtract 846 from 1188, we get 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Let's proceed to step 8:
If we divide 3420 by 423, we get 8 and a remainder of 36.
Use 8 as the next digit of our solution. 
Result so far: 2372.8
Subtracting 3384 from 3420 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 9:
The number 423 fits into 360 0 times, leaving a remainder of 360.
The next digit of our result is 0. 
Result so far: 2372.8
The remainder is 360 after subtracting 0 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 10:
When dividing 3600 by 423, we get 8 with a remainder of 216.
Write down 8 as next digit of the result. 
Result so far: 2372.808
If we subtract 3384 from 3600, we get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Advancing to step 11:
423 goes into 2160 5 times with a remainder of 45.
Record the quotient 5 as the next digit in the result. 
Result so far: 2372.8085
Subtract 2115 from 2160 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Step 12:
423 can be fit into 450 1 times, resulting in a remainder of 27.
Write down 1 as next digit of the result. 
Result so far: 2372.80851
Subtract 423 from 450 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 13:
423 goes into 270 0 times with a remainder of 270.
Put 0 as the next digit of the answer. 
Result so far: 2372.80851
Deduct 0 from 270 and we're left with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Step 14:
2700 divided by 423 is 6 with a remainder of 162.
Use 6 as the next digit of our solution. 
Result so far: 2372.8085106
Deduct 2538 from 2700 and we're left with 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Going ahead to step 15:
423 goes into 1620 3 times with a remainder of 351.
Write down 3 as next digit of the result. 
Result so far: 2372.80851063
Deduct 1269 from 1620 and we're left with 351.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3510, and continue the process.

After the division, we end up with 2372.80851063 and a remainder of 3.51e-07.