We're dividing 21443289 by 787 
The aim is to understand the frequency of 787 in 21443289.

Advancing to step 1:
787 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 787

Step 2:
787 can be fit into 21 0 times, resulting in a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 787

Step 3:
When dividing 214 by 787, we get 0 with a remainder of 214.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 214 leaves us with 214.
Grab the next digit (4) from the dividend, add it to 214, then carry on: 2144 / 787

Advancing to step 4:
787 goes into 2144 2 times with a remainder of 570.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 570 after subtracting 1574 from 2144.
Bring next digit (3) of the dividend behind the 570 and repeat the process: 5703 / 787

On to step 5:
The number 787 fits into 5703 7 times, leaving a remainder of 194.
Record the quotient 7 as the next digit in the result. 
Result so far: 27.0
Deduct 5509 from 5703 and we're left with 194.
Fetch the next digit (2) from the dividend, attach it to 194 and continue: 1942 / 787

On to step 6:
When dividing 1942 by 787, we get 2 with a remainder of 368.
Use 2 as the next digit of our solution. 
Result so far: 272.0
Deduct 1574 from 1942 and we're left with 368.
Fetch the next digit (8) from the dividend, attach it to 368 and continue: 3688 / 787

On to step 7:
787 goes into 3688 4 times with a remainder of 540.
Use 4 as the next digit of our solution. 
Result so far: 2724.0
If we take 3148 away from 3688, we end up with 540.
Append the next digit (9) from the dividend to 540 and continue with: 5409 / 787

Let's proceed to step 8:
When dividing 5409 by 787, we get 6 with a remainder of 687.
The next digit of our result is 6. 
Result so far: 27246.0
Subtract 4722 from 5409 to get 687.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6870, and continue the process.

Advancing to step 9:
6870 divided by 787 is 8 with a remainder of 574.
The next digit of our result is 8. 
Result so far: 27246.8
Subtracting 6296 from 6870 leaves us with 574.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5740, and continue the process.

On to step 10:
When dividing 5740 by 787, we get 7 with a remainder of 231.
The number 7 becomes the next digit in our result. 
Result so far: 27246.87
Subtract 5509 from 5740 to get 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

On to step 11:
If we divide 2310 by 787, we get 2 and a remainder of 736.
Record the quotient 2 as the next digit in the result. 
Result so far: 27246.872
Subtracting 1574 from 2310 leaves us with 736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

Moving on to step 12:
787 goes into 7360 9 times with a remainder of 277.
Use 9 as the next digit of our solution. 
Result so far: 27246.8729
The remainder is 277 after subtracting 7083 from 7360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2770, and continue the process.

Going ahead to step 13:
When dividing 2770 by 787, we get 3 with a remainder of 409.
Record the quotient 3 as the next digit in the result. 
Result so far: 27246.87293
If we subtract 2361 from 2770, we get 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Moving on to step 14:
The number 787 fits into 4090 5 times, leaving a remainder of 155.
Write down 5 as next digit of the result. 
Result so far: 27246.872935
The remainder is 155 after subtracting 3935 from 4090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Step 15:
When dividing 1550 by 787, we get 1 with a remainder of 763.
The next digit of our result is 1. 
Result so far: 27246.8729351
Deduct 787 from 1550 and we're left with 763.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7630, and continue the process.

On to step 16:
787 goes into 7630 9 times with a remainder of 547.
Record the quotient 9 as the next digit in the result. 
Result so far: 27246.87293519
Subtracting 7083 from 7630 leaves us with 547.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5470, and continue the process.

After the division, we end up with 27246.87293519 and a remainder of 5.47e-07.