3944488 ÷ 789 
The aim is to understand the frequency of 789 in 3944488.

Step 1:
When dividing 3 by 789, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 789

On to step 2:
39 divided by 789 is 0 with a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Include the next digit (4) from the dividend after 39, then repeat: 394 / 789

Moving on to step 3:
789 goes into 394 0 times with a remainder of 394.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 394, we get 394.
Include the next digit (4) from the dividend after 394, then repeat: 3944 / 789

Going ahead to step 4:
When dividing 3944 by 789, we get 4 with a remainder of 788.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 3156 from 3944, we get 788.
Grab the next digit (4) from the dividend, add it to 788, then carry on: 7884 / 789

Moving on to step 5:
789 can be fit into 7884 9 times, resulting in a remainder of 783.
Put 9 as the next digit of the answer. 
Result so far: 49.0
If we subtract 7101 from 7884, we get 783.
Append the next digit (8) from the dividend to 783 and continue with: 7838 / 789

Step 6:
When dividing 7838 by 789, we get 9 with a remainder of 737.
Record the quotient 9 as the next digit in the result. 
Result so far: 499.0
If we take 7101 away from 7838, we end up with 737.
Bring next digit (8) of the dividend behind the 737 and repeat the process: 7378 / 789

Moving on to step 7:
7378 divided by 789 is 9 with a remainder of 277.
Put 9 as the next digit of the answer. 
Result so far: 4999.0
Deduct 7101 from 7378 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.

Step 8:
2770 divided by 789 is 3 with a remainder of 403.
Put 3 as the next digit of the answer. 
Result so far: 4999.3
Subtract 2367 from 2770 to get 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Going ahead to step 9:
789 can be fit into 4030 5 times, resulting in a remainder of 85.
Put 5 as the next digit of the answer. 
Result so far: 4999.35
If we take 3945 away from 4030, we end up with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Advancing to step 10:
789 goes into 850 1 times with a remainder of 61.
The number 1 becomes the next digit in our result. 
Result so far: 4999.351
The remainder is 61 after subtracting 789 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Let's proceed to step 11:
If we divide 610 by 789, we get 0 and a remainder of 610.
Write down 0 as next digit of the result. 
Result so far: 4999.351
If we subtract 0 from 610, we get 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Going ahead to step 12:
If we divide 6100 by 789, we get 7 and a remainder of 577.
Put 7 as the next digit of the answer. 
Result so far: 4999.35107
If we take 5523 away from 6100, we end up with 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Moving on to step 13:
789 goes into 5770 7 times with a remainder of 247.
The next digit of our result is 7. 
Result so far: 4999.351077
If we subtract 5523 from 5770, we get 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

The quotient of the division is 4999.351077, and the remainder is 2.47e-05.