51958109 divided by 423 
The aim is to understand the frequency of 423 in 51958109.

Moving on to step 1:
5 divided by 423 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 423

Let's proceed to step 2:
If we divide 51 by 423, we get 0 and a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (9) from the dividend to 51 and continue with: 519 / 423

Let's proceed to step 3:
When dividing 519 by 423, we get 1 with a remainder of 96.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 423 from 519 and we're left with 96.
Include the next digit (5) from the dividend after 96, then repeat: 965 / 423

Let's proceed to step 4:
423 goes into 965 2 times with a remainder of 119.
The next digit of our result is 2. 
Result so far: 12.0
Subtracting 846 from 965 leaves us with 119.
Include the next digit (8) from the dividend after 119, then repeat: 1198 / 423

Step 5:
If we divide 1198 by 423, we get 2 and a remainder of 352.
Write down 2 as next digit of the result. 
Result so far: 122.0
Subtracting 846 from 1198 leaves us with 352.
Take the next digit (1) from the dividend and append it to 352, then repeat: 3521 / 423

Advancing to step 6:
3521 divided by 423 is 8 with a remainder of 137.
Record the quotient 8 as the next digit in the result. 
Result so far: 1228.0
The remainder is 137 after subtracting 3384 from 3521.
Append the next digit (0) from the dividend to 137 and continue with: 1370 / 423

Advancing to step 7:
423 can be fit into 1370 3 times, resulting in a remainder of 101.
Put 3 as the next digit of the answer. 
Result so far: 12283.0
If we subtract 1269 from 1370, we get 101.
Take the next digit (9) from the dividend and append it to 101, then repeat: 1019 / 423

Advancing to step 8:
When dividing 1019 by 423, we get 2 with a remainder of 173.
Put 2 as the next digit of the answer. 
Result so far: 122832.0
Subtract 846 from 1019 to get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Advancing to step 9:
If we divide 1730 by 423, we get 4 and a remainder of 38.
Use 4 as the next digit of our solution. 
Result so far: 122832.4
If we subtract 1692 from 1730, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 10:
The number 423 fits into 380 0 times, leaving a remainder of 380.
Write down 0 as next digit of the result. 
Result so far: 122832.4
If we subtract 0 from 380, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 11:
The number 423 fits into 3800 8 times, leaving a remainder of 416.
The next digit of our result is 8. 
Result so far: 122832.408
Deduct 3384 from 3800 and we're left with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Advancing to step 12:
The number 423 fits into 4160 9 times, leaving a remainder of 353.
Use 9 as the next digit of our solution. 
Result so far: 122832.4089
Subtracting 3807 from 4160 leaves us with 353.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3530, and continue the process.

Let's proceed to step 13:
The number 423 fits into 3530 8 times, leaving a remainder of 146.
The number 8 becomes the next digit in our result. 
Result so far: 122832.40898
The remainder is 146 after subtracting 3384 from 3530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Going ahead to step 14:
1460 divided by 423 is 3 with a remainder of 191.
Put 3 as the next digit of the answer. 
Result so far: 122832.408983
Deduct 1269 from 1460 and we're left with 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Moving on to step 15:
When dividing 1910 by 423, we get 4 with a remainder of 218.
Write down 4 as next digit of the result. 
Result so far: 122832.4089834
Subtracting 1692 from 1910 leaves us with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Going ahead to step 16:
423 goes into 2180 5 times with a remainder of 65.
Write down 5 as next digit of the result. 
Result so far: 122832.40898345
Deduct 2115 from 2180 and we're left with 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

The quotient of the division is 122832.40898345, and the remainder is 6.5e-08.