Let's divide 54393619 by 78
The aim is to understand the frequency of 78 in 54393619.

Moving on to step 1:
The number 78 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 78

On to step 2:
78 goes into 54 0 times with a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 54, we end up with 54.
Grab the next digit (3) from the dividend, add it to 54, then carry on: 543 / 78

Let's proceed to step 3:
The number 78 fits into 543 6 times, leaving a remainder of 75.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 468 away from 543, we end up with 75.
Take the next digit (9) from the dividend and append it to 75, then repeat: 759 / 78

Going ahead to step 4:
78 goes into 759 9 times with a remainder of 57.
Put 9 as the next digit of the answer. 
Result so far: 69.0
Subtracting 702 from 759 leaves us with 57.
Append the next digit (3) from the dividend to 57 and continue with: 573 / 78

On to step 5:
If we divide 573 by 78, we get 7 and a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 697.0
Subtracting 546 from 573 leaves us with 27.
Append the next digit (6) from the dividend to 27 and continue with: 276 / 78

On to step 6:
When dividing 276 by 78, we get 3 with a remainder of 42.
Put 3 as the next digit of the answer. 
Result so far: 6973.0
Deduct 234 from 276 and we're left with 42.
Append the next digit (1) from the dividend to 42 and continue with: 421 / 78

Moving on to step 7:
The number 78 fits into 421 5 times, leaving a remainder of 31.
Use 5 as the next digit of our solution. 
Result so far: 69735.0
Deduct 390 from 421 and we're left with 31.
Grab the next digit (9) from the dividend, add it to 31, then carry on: 319 / 78

Step 8:
The number 78 fits into 319 4 times, leaving a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 697354.0
If we subtract 312 from 319, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 9:
70 divided by 78 is 0 with a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 697354.0
Deduct 0 from 70 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 10:
The number 78 fits into 700 8 times, leaving a remainder of 76.
Write down 8 as next digit of the result. 
Result so far: 697354.08
Deduct 624 from 700 and we're left 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.

Step 11:
When dividing 760 by 78, we get 9 with a remainder of 58.
Write down 9 as next digit of the result. 
Result so far: 697354.089
Subtracting 702 from 760 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 12:
The number 78 fits into 580 7 times, leaving a remainder of 34.
The number 7 becomes the next digit in our result. 
Result so far: 697354.0897
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.

Step 13:
When dividing 340 by 78, we get 4 with a remainder of 28.
The next digit of our result is 4. 
Result so far: 697354.08974
Deduct 312 from 340 and we're left 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 14:
78 goes into 280 3 times with a remainder of 46.
Write down 3 as next digit of the result. 
Result so far: 697354.089743
Subtract 234 from 280 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 15:
78 goes into 460 5 times with a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 697354.0897435
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.

Step 16:
The number 78 fits into 700 8 times, leaving a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 697354.08974358
Subtracting 624 from 700 leaves us 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.

Our division results in 697354.08974358 with a remaining 7.6e-08.