643158 divided by 268 
The aim is to understand the frequency of 268 in 643158.

Let's proceed to step 1:
When dividing 6 by 268, we get 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 268

Going ahead to step 2:
268 goes into 64 0 times with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Bring next digit (3) of the dividend behind the 64 and repeat the process: 643 / 268

Let's proceed to step 3:
The number 268 fits into 643 2 times, leaving a remainder of 107.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 107 after subtracting 536 from 643.
Fetch the next digit (1) from the dividend, attach it to 107 and continue: 1071 / 268

Step 4:
1071 divided by 268 is 3 with a remainder of 267.
Write down 3 as next digit of the result. 
Result so far: 23.0
The remainder is 267 after subtracting 804 from 1071.
Append the next digit (5) from the dividend to 267 and continue with: 2675 / 268

Moving on to step 5:
If we divide 2675 by 268, we get 9 and a remainder of 263.
The number 9 becomes the next digit in our result. 
Result so far: 239.0
The remainder is 263 after subtracting 2412 from 2675.
Append the next digit (8) from the dividend to 263 and continue with: 2638 / 268

Let's proceed to step 6:
2638 divided by 268 is 9 with a remainder of 226.
Put 9 as the next digit of the answer. 
Result so far: 2399.0
Subtracting 2412 from 2638 leaves us with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Step 7:
268 goes into 2260 8 times with a remainder of 116.
Use 8 as the next digit of our solution. 
Result so far: 2399.8
Subtracting 2144 from 2260 leaves us with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 8:
1160 divided by 268 is 4 with a remainder of 88.
The number 4 becomes the next digit in our result. 
Result so far: 2399.84
Subtracting 1072 from 1160 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.

Advancing to step 9:
268 goes into 880 3 times with a remainder of 76.
The number 3 becomes the next digit in our result. 
Result so far: 2399.843
Deduct 804 from 880 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 10:
760 divided by 268 is 2 with a remainder of 224.
Use 2 as the next digit of our solution. 
Result so far: 2399.8432
Deduct 536 from 760 and we're left with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Step 11:
2240 divided by 268 is 8 with a remainder of 96.
Record the quotient 8 as the next digit in the result. 
Result so far: 2399.84328
Subtract 2144 from 2240 to get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Step 12:
When dividing 960 by 268, we get 3 with a remainder of 156.
Record the quotient 3 as the next digit in the result. 
Result so far: 2399.843283
If we subtract 804 from 960, we get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Advancing to step 13:
When dividing 1560 by 268, we get 5 with a remainder of 220.
Record the quotient 5 as the next digit in the result. 
Result so far: 2399.8432835
Deduct 1340 from 1560 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Advancing to step 14:
The number 268 fits into 2200 8 times, leaving a remainder of 56.
The number 8 becomes the next digit in our result. 
Result so far: 2399.84328358
The remainder is 56 after subtracting 2144 from 2200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final outcome is 2399.84328358, with a leftover of 5.6e-08.