659921 divided by 78 
The aim is to understand the frequency of 78 in 659921.

On to step 1:
If we divide 6 by 78, we get 0 and a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 78

Let's proceed to step 2:
78 can be fit into 65 0 times, resulting in a remainder of 65.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 65 leaves us with 65.
Bring next digit (9) of the dividend behind the 65 and repeat the process: 659 / 78

Let's proceed to step 3:
When dividing 659 by 78, we get 8 with a remainder of 35.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 624 from 659, we get 35.
Grab the next digit (9) from the dividend, add it to 35, then carry on: 359 / 78

Going ahead to step 4:
78 can be fit into 359 4 times, resulting in a remainder of 47.
Put 4 as the next digit of the answer. 
Result so far: 84.0
Deduct 312 from 359 and we're left with 47.
Fetch the next digit (2) from the dividend, attach it to 47 and continue: 472 / 78

Going ahead to step 5:
When dividing 472 by 78, we get 6 with a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 846.0
Subtract 468 from 472 to get 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 78

Advancing to step 6:
If we divide 41 by 78, we get 0 and a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 8460.0
The remainder is 41 after subtracting 0 from 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 7:
If we divide 410 by 78, we get 5 and a remainder of 20.
Use 5 as the next digit of our solution. 
Result so far: 8460.5
The remainder is 20 after subtracting 390 from 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
200 divided by 78 is 2 with a remainder of 44.
The next digit of our result is 2. 
Result so far: 8460.52
If we take 156 away from 200, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
If we divide 440 by 78, we get 5 and a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 8460.525
Deduct 390 from 440 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 10:
78 can be fit into 500 6 times, resulting in a remainder of 32.
Record the quotient 6 as the next digit in the result. 
Result so far: 8460.5256
Subtract 468 from 500 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 11:
78 can be fit into 320 4 times, resulting in a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 8460.52564
Subtracting 312 from 320 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
If we divide 80 by 78, we get 1 and a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 8460.525641
Subtracting 78 from 80 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 13:
If we divide 20 by 78, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 8460.525641
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 14:
78 can be fit into 200 2 times, resulting in a remainder of 44.
The next digit of our result is 2. 
Result so far: 8460.52564102
The remainder is 44 after subtracting 156 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 8460.52564102, with a leftover of 4.4e-08.