849520 divided by 78 
The aim is to understand the frequency of 78 in 849520.

Step 1:
8 divided by 78 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 78

Step 2:
84 divided by 78 is 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 6 after subtracting 78 from 84.
Append the next digit (9) from the dividend to 6 and continue with: 69 / 78

Let's proceed to step 3:
When dividing 69 by 78, we get 0 with a remainder of 69.
Write down 0 as next digit of the result. 
Result so far: 10.0
The remainder is 69 after subtracting 0 from 69.
Include the next digit (5) from the dividend after 69, then repeat: 695 / 78

Advancing to step 4:
78 can be fit into 695 8 times, resulting in a remainder of 71.
Put 8 as the next digit of the answer. 
Result so far: 108.0
Subtract 624 from 695 to get 71.
Bring next digit (2) of the dividend behind the 71 and repeat the process: 712 / 78

Advancing to step 5:
The number 78 fits into 712 9 times, leaving a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 1089.0
The remainder is 10 after subtracting 702 from 712.
Append the next digit (0) from the dividend to 10 and continue with: 100 / 78

Going ahead to step 6:
100 divided by 78 is 1 with a remainder of 22.
The next digit of our result is 1. 
Result so far: 10891.0
Deduct 78 from 100 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
78 can be fit into 220 2 times, resulting in a remainder of 64.
Use 2 as the next digit of our solution. 
Result so far: 10891.2
The remainder is 64 after subtracting 156 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 8:
The number 78 fits into 640 8 times, leaving a remainder of 16.
Put 8 as the next digit of the answer. 
Result so far: 10891.28
Deduct 624 from 640 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
78 can be fit into 160 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 10891.282
Subtracting 156 from 160 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 10:
If we divide 40 by 78, we get 0 and a remainder of 40.
The next digit of our result is 0. 
Result so far: 10891.282
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
78 can be fit into 400 5 times, resulting in a remainder of 10.
The next digit of our result is 5. 
Result so far: 10891.28205
If we take 390 away from 400, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 12:
If we divide 100 by 78, we get 1 and a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 10891.282051
The remainder is 22 after subtracting 78 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 13:
220 divided by 78 is 2 with a remainder of 64.
The number 2 becomes the next digit in our result. 
Result so far: 10891.2820512
Subtract 156 from 220 to get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

On to step 14:
If we divide 640 by 78, we get 8 and a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 10891.28205128
Deduct 624 from 640 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 10891.28205128, with a leftover of 1.6e-08.