7866619 divided by 423 
The aim is to understand the frequency of 423 in 7866619.

Step 1:
The number 423 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 423

Let's proceed to step 2:
When dividing 78 by 423, we get 0 with a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 78, we end up with 78.
Bring next digit (6) of the dividend behind the 78 and repeat the process: 786 / 423

Step 3:
If we divide 786 by 423, we get 1 and a remainder of 363.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 423 from 786 and we're left with 363.
Append the next digit (6) from the dividend to 363 and continue with: 3636 / 423

Step 4:
The number 423 fits into 3636 8 times, leaving a remainder of 252.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Deduct 3384 from 3636 and we're left with 252.
Fetch the next digit (6) from the dividend, attach it to 252 and continue: 2526 / 423

Moving on to step 5:
423 goes into 2526 5 times with a remainder of 411.
The next digit of our result is 5. 
Result so far: 185.0
Deduct 2115 from 2526 and we're left with 411.
Include the next digit (1) from the dividend after 411, then repeat: 4111 / 423

Let's proceed to step 6:
423 goes into 4111 9 times with a remainder of 304.
Put 9 as the next digit of the answer. 
Result so far: 1859.0
The remainder is 304 after subtracting 3807 from 4111.
Append the next digit (9) from the dividend to 304 and continue with: 3049 / 423

Moving on to step 7:
If we divide 3049 by 423, we get 7 and a remainder of 88.
The number 7 becomes the next digit in our result. 
Result so far: 18597.0
Subtracting 2961 from 3049 leaves us with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 8:
When dividing 880 by 423, we get 2 with a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 18597.2
If we subtract 846 from 880, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 9:
If we divide 340 by 423, we get 0 and a remainder of 340.
Use 0 as the next digit of our solution. 
Result so far: 18597.2
The remainder is 340 after subtracting 0 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 10:
423 goes into 3400 8 times with a remainder of 16.
Use 8 as the next digit of our solution. 
Result so far: 18597.208
Subtract 3384 from 3400 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
When dividing 160 by 423, we get 0 with a remainder of 160.
Write down 0 as next digit of the result. 
Result so far: 18597.208
Subtracting 0 from 160 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Let's proceed to step 12:
When dividing 1600 by 423, we get 3 with a remainder of 331.
The number 3 becomes the next digit in our result. 
Result so far: 18597.20803
If we subtract 1269 from 1600, we get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

Moving on to step 13:
423 can be fit into 3310 7 times, resulting in a remainder of 349.
Record the quotient 7 as the next digit in the result. 
Result so far: 18597.208037
Subtract 2961 from 3310 to get 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Step 14:
When dividing 3490 by 423, we get 8 with a remainder of 106.
The number 8 becomes the next digit in our result. 
Result so far: 18597.2080378
Subtract 3384 from 3490 to get 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

Moving on to step 15:
423 goes into 1060 2 times with a remainder of 214.
Record the quotient 2 as the next digit in the result. 
Result so far: 18597.20803782
Subtract 846 from 1060 to get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

In conclusion, the division gives 18597.20803782 with a balance of 2.14e-07.