We divide 42351333 by 643
The aim is to understand the frequency of 643 in 42351333.

Step 1:
643 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 643

Advancing to step 2:
42 divided by 643 is 0 with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Include the next digit (3) from the dividend after 42, then repeat: 423 / 643

Let's proceed to step 3:
If we divide 423 by 643, we get 0 and a remainder of 423.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 423 and we're left with 423.
Take the next digit (5) from the dividend and append it to 423, then repeat: 4235 / 643

Going ahead to step 4:
643 goes into 4235 6 times with a remainder of 377.
Use 6 as the next digit of our solution. 
Result so far: 6.0
The remainder is 377 after subtracting 3858 from 4235.
Append the next digit (1) from the dividend to 377 and continue with: 3771 / 643

Moving on to step 5:
3771 divided by 643 is 5 with a remainder of 556.
Write down 5 as next digit of the result. 
Result so far: 65.0
If we take 3215 away from 3771, we end up with 556.
Append the next digit (3) from the dividend to 556 and continue with: 5563 / 643

Going ahead to step 6:
643 goes into 5563 8 times with a remainder of 419.
Put 8 as the next digit of the answer. 
Result so far: 658.0
If we take 5144 away from 5563, we end up with 419.
Bring next digit (3) of the dividend behind the 419 and repeat the process: 4193 / 643

Advancing to step 7:
643 goes into 4193 6 times with a remainder of 335.
Write down 6 as next digit of the result. 
Result so far: 6586.0
If we take 3858 away from 4193, we end up with 335.
Bring next digit (3) of the dividend behind the 335 and repeat the process: 3353 / 643

On to step 8:
When dividing 3353 by 643, we get 5 with a remainder of 138.
Put 5 as the next digit of the answer. 
Result so far: 65865.0
If we take 3215 away from 3353, we end up with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Step 9:
The number 643 fits into 1380 2 times, leaving a remainder of 94.
Use 2 as the next digit of our solution. 
Result so far: 65865.2
If we take 1286 away from 1380, we end up with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Advancing to step 10:
If we divide 940 by 643, we get 1 and a remainder of 297.
The next digit of our result is 1. 
Result so far: 65865.21
Subtracting 643 from 940 leaves us with 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Let's proceed to step 11:
643 can be fit into 2970 4 times, resulting in a remainder of 398.
Write down 4 as next digit of the result. 
Result so far: 65865.214
The remainder is 398 after subtracting 2572 from 2970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

On to step 12:
643 goes into 3980 6 times with a remainder of 122.
Record the quotient 6 as the next digit in the result. 
Result so far: 65865.2146
If we subtract 3858 from 3980, we get 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Going ahead to step 13:
643 can be fit into 1220 1 times, resulting in a remainder of 577.
Write down 1 as next digit of the result. 
Result so far: 65865.21461
The remainder is 577 after subtracting 643 from 1220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Let's proceed to step 14:
If we divide 5770 by 643, we get 8 and a remainder of 626.
Record the quotient 8 as the next digit in the result. 
Result so far: 65865.214618
If we subtract 5144 from 5770, we get 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

On to step 15:
643 can be fit into 6260 9 times, resulting in a remainder of 473.
Put 9 as the next digit of the answer. 
Result so far: 65865.2146189
Subtracting 5787 from 6260 leaves us with 473.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4730, and continue the process.

Advancing to step 16:
643 goes into 4730 7 times with a remainder of 229.
The number 7 becomes the next digit in our result. 
Result so far: 65865.21461897
If we subtract 4501 from 4730, we get 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

After the division, we end up with 65865.21461897 and a remainder of 2.29e-07.