We're dividing 43981 by 78 
The aim is to understand the frequency of 78 in 43981.

On to step 1:
If we divide 4 by 78, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 78

Advancing to step 2:
The number 78 fits into 43 0 times, leaving a remainder of 43.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 43, we get 43.
Grab the next digit (9) from the dividend, add it to 43, then carry on: 439 / 78

On to step 3:
The number 78 fits into 439 5 times, leaving a remainder of 49.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
Subtracting 390 from 439 leaves us with 49.
Append the next digit (8) from the dividend to 49 and continue with: 498 / 78

Moving on to step 4:
When dividing 498 by 78, we get 6 with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 56.0
Deduct 468 from 498 and we're left with 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 78

Let's proceed to step 5:
78 goes into 301 3 times with a remainder of 67.
Write down 3 as next digit of the result. 
Result so far: 563.0
If we subtract 234 from 301, we get 67.
Since there are no more digits in the dividend, we add a zero to the remainder making it 670, and continue the process.

Let's proceed to step 6:
The number 78 fits into 670 8 times, leaving a remainder of 46.
Put 8 as the next digit of the answer. 
Result so far: 563.8
Subtracting 624 from 670 leaves us with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 7:
78 goes into 460 5 times with a remainder of 70.
The next digit of our result is 5. 
Result so far: 563.85
Deduct 390 from 460 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 8:
700 divided by 78 is 8 with a remainder of 76.
The next digit of our result is 8. 
Result so far: 563.858
If we take 624 away from 700, we end up 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.

On to step 9:
The number 78 fits into 760 9 times, leaving a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 563.8589
Subtract 702 from 760 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 10:
The number 78 fits into 580 7 times, leaving a remainder of 34.
Write down 7 as next digit of the result. 
Result so far: 563.85897
The remainder is 34 after subtracting 546 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 11:
When dividing 340 by 78, we get 4 with a remainder of 28.
Record the quotient 4 as the next digit in the result. 
Result so far: 563.858974
Subtracting 312 from 340 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 12:
280 divided by 78 is 3 with a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 563.8589743
The remainder is 46 after subtracting 234 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 13:
The number 78 fits into 460 5 times, leaving a remainder of 70.
Record the quotient 5 as the next digit in the result. 
Result so far: 563.85897435
The remainder is 70 after subtracting 390 from 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final result is 563.85897435 with a remainder of 7e-08.