573406 divided by 78 
The aim is to understand the frequency of 78 in 573406.

Step 1:
When dividing 5 by 78, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 78

On to step 2:
If we divide 57 by 78, we get 0 and a remainder of 57.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 57 to get 57.
Bring next digit (3) of the dividend behind the 57 and repeat the process: 573 / 78

Moving on to step 3:
78 goes into 573 7 times with a remainder of 27.
The next digit of our result is 7. 
Result so far: 7.0
The remainder is 27 after subtracting 546 from 573.
Fetch the next digit (4) from the dividend, attach it to 27 and continue: 274 / 78

Let's proceed to step 4:
When dividing 274 by 78, we get 3 with a remainder of 40.
Put 3 as the next digit of the answer. 
Result so far: 73.0
If we take 234 away from 274, we end up with 40.
Grab the next digit (0) from the dividend, add it to 40, then carry on: 400 / 78

Moving on to step 5:
If we divide 400 by 78, we get 5 and a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 735.0
If we subtract 390 from 400, we get 10.
Take the next digit (6) from the dividend and append it to 10, then repeat: 106 / 78

Going ahead to step 6:
If we divide 106 by 78, we get 1 and a remainder of 28.
Use 1 as the next digit of our solution. 
Result so far: 7351.0
The remainder is 28 after subtracting 78 from 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 7:
The number 78 fits into 280 3 times, leaving a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 7351.3
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.

Advancing to step 8:
The number 78 fits into 460 5 times, leaving a remainder of 70.
The next digit of our result is 5. 
Result so far: 7351.35
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.

Advancing to step 9:
78 goes into 700 8 times with a remainder of 76.
Put 8 as the next digit of the answer. 
Result so far: 7351.358
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.

On to step 10:
When dividing 760 by 78, we get 9 with a remainder of 58.
Use 9 as the next digit of our solution. 
Result so far: 7351.3589
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.

Let's proceed to step 11:
78 goes into 580 7 times with a remainder of 34.
Record the quotient 7 as the next digit in the result. 
Result so far: 7351.35897
Subtract 546 from 580 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 12:
340 divided by 78 is 4 with a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 7351.358974
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 13:
If we divide 280 by 78, we get 3 and a remainder of 46.
The next digit of our result is 3. 
Result so far: 7351.3589743
If we take 234 away from 280, we end up 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.

Moving on to step 14:
The number 78 fits into 460 5 times, leaving a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 7351.35897435
If we take 390 away from 460, we end up 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.

The final outcome is 7351.35897435, with a leftover of 7e-08.