38848896 ÷ 643 
The aim is to understand the frequency of 643 in 38848896.

Going ahead to step 1:
When dividing 3 by 643, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (8) from the dividend, add it to 3, then carry on: 38 / 643

Let's proceed to step 2:
If we divide 38 by 643, we get 0 and a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 38 leaves us with 38.
Fetch the next digit (8) from the dividend, attach it to 38 and continue: 388 / 643

Going ahead to step 3:
643 can be fit into 388 0 times, resulting in a remainder of 388.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 388, we end up with 388.
Include the next digit (4) from the dividend after 388, then repeat: 3884 / 643

On to step 4:
3884 divided by 643 is 6 with a remainder of 26.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we take 3858 away from 3884, we end up with 26.
Include the next digit (8) from the dividend after 26, then repeat: 268 / 643

Let's proceed to step 5:
The number 643 fits into 268 0 times, leaving a remainder of 268.
Record the quotient 0 as the next digit in the result. 
Result so far: 60.0
If we take 0 away from 268, we end up with 268.
Append the next digit (8) from the dividend to 268 and continue with: 2688 / 643

Going ahead to step 6:
When dividing 2688 by 643, we get 4 with a remainder of 116.
Put 4 as the next digit of the answer. 
Result so far: 604.0
The remainder is 116 after subtracting 2572 from 2688.
Append the next digit (9) from the dividend to 116 and continue with: 1169 / 643

Going ahead to step 7:
When dividing 1169 by 643, we get 1 with a remainder of 526.
The next digit of our result is 1. 
Result so far: 6041.0
If we take 643 away from 1169, we end up with 526.
Append the next digit (6) from the dividend to 526 and continue with: 5266 / 643

Step 8:
5266 divided by 643 is 8 with a remainder of 122.
Use 8 as the next digit of our solution. 
Result so far: 60418.0
Subtract 5144 from 5266 to 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.

Moving on to step 9:
When dividing 1220 by 643, we get 1 with a remainder of 577.
Record the quotient 1 as the next digit in the result. 
Result so far: 60418.1
Subtract 643 from 1220 to get 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Step 10:
643 goes into 5770 8 times with a remainder of 626.
Record the quotient 8 as the next digit in the result. 
Result so far: 60418.18
The remainder is 626 after subtracting 5144 from 5770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Advancing to step 11:
643 can be fit into 6260 9 times, resulting in a remainder of 473.
Record the quotient 9 as the next digit in the result. 
Result so far: 60418.189
If we take 5787 away from 6260, we end up 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 12:
643 can be fit into 4730 7 times, resulting in a remainder of 229.
Put 7 as the next digit of the answer. 
Result so far: 60418.1897
Deduct 4501 from 4730 and we're left with 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

On to step 13:
643 can be fit into 2290 3 times, resulting in a remainder of 361.
Write down 3 as next digit of the result. 
Result so far: 60418.18973
Subtracting 1929 from 2290 leaves us with 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Advancing to step 14:
If we divide 3610 by 643, we get 5 and a remainder of 395.
Use 5 as the next digit of our solution. 
Result so far: 60418.189735
Subtract 3215 from 3610 to get 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Advancing to step 15:
If we divide 3950 by 643, we get 6 and a remainder of 92.
Use 6 as the next digit of our solution. 
Result so far: 60418.1897356
Subtract 3858 from 3950 to get 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Step 16:
When dividing 920 by 643, we get 1 with a remainder of 277.
Put 1 as the next digit of the answer. 
Result so far: 60418.18973561
Deduct 643 from 920 and we're left with 277.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

In conclusion, the division gives 60418.18973561 with a balance of 2.77e-07.