9976605 ÷ 423 
The aim is to understand the frequency of 423 in 9976605.

Moving on to step 1:
When dividing 9 by 423, we get 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (9) from the dividend to 9 and continue with: 99 / 423

Step 2:
423 goes into 99 0 times with a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 99 after subtracting 0 from 99.
Include the next digit (7) from the dividend after 99, then repeat: 997 / 423

Advancing to step 3:
423 goes into 997 2 times with a remainder of 151.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 151 after subtracting 846 from 997.
Grab the next digit (6) from the dividend, add it to 151, then carry on: 1516 / 423

Step 4:
The number 423 fits into 1516 3 times, leaving a remainder of 247.
Put 3 as the next digit of the answer. 
Result so far: 23.0
If we take 1269 away from 1516, we end up with 247.
Include the next digit (6) from the dividend after 247, then repeat: 2476 / 423

Step 5:
If we divide 2476 by 423, we get 5 and a remainder of 361.
The number 5 becomes the next digit in our result. 
Result so far: 235.0
If we take 2115 away from 2476, we end up with 361.
Include the next digit (0) from the dividend after 361, then repeat: 3610 / 423

Moving on to step 6:
423 can be fit into 3610 8 times, resulting in a remainder of 226.
Record the quotient 8 as the next digit in the result. 
Result so far: 2358.0
Subtracting 3384 from 3610 leaves us with 226.
Fetch the next digit (5) from the dividend, attach it to 226 and continue: 2265 / 423

Moving on to step 7:
When dividing 2265 by 423, we get 5 with a remainder of 150.
Put 5 as the next digit of the answer. 
Result so far: 23585.0
The remainder is 150 after subtracting 2115 from 2265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Let's proceed to step 8:
423 goes into 1500 3 times with a remainder of 231.
Put 3 as the next digit of the answer. 
Result so far: 23585.3
The remainder is 231 after subtracting 1269 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

Advancing to step 9:
423 goes into 2310 5 times with a remainder of 195.
Put 5 as the next digit of the answer. 
Result so far: 23585.35
The remainder is 195 after subtracting 2115 from 2310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Step 10:
1950 divided by 423 is 4 with a remainder of 258.
Write down 4 as next digit of the result. 
Result so far: 23585.354
Subtracting 1692 from 1950 leaves us with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Advancing to step 11:
423 can be fit into 2580 6 times, resulting in a remainder of 42.
The number 6 becomes the next digit in our result. 
Result so far: 23585.3546
Deduct 2538 from 2580 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 12:
420 divided by 423 is 0 with a remainder of 420.
The next digit of our result is 0. 
Result so far: 23585.3546
If we subtract 0 from 420, we get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

On to step 13:
423 goes into 4200 9 times with a remainder of 393.
Record the quotient 9 as the next digit in the result. 
Result so far: 23585.354609
Deduct 3807 from 4200 and we're left with 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Advancing to step 14:
When dividing 3930 by 423, we get 9 with a remainder of 123.
Put 9 as the next digit of the answer. 
Result so far: 23585.3546099
If we subtract 3807 from 3930, we get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Our division results in 23585.3546099 with a remaining 1.23e-06.