645445 divided by 78 
The aim is to understand the frequency of 78 in 645445.

On to step 1:
78 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 78

Going ahead to step 2:
When dividing 64 by 78, we get 0 with a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Bring next digit (5) of the dividend behind the 64 and repeat the process: 645 / 78

Step 3:
645 divided by 78 is 8 with a remainder of 21.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 624 from 645 leaves us with 21.
Fetch the next digit (4) from the dividend, attach it to 21 and continue: 214 / 78

Step 4:
78 can be fit into 214 2 times, resulting in a remainder of 58.
Write down 2 as next digit of the result. 
Result so far: 82.0
Subtracting 156 from 214 leaves us with 58.
Fetch the next digit (4) from the dividend, attach it to 58 and continue: 584 / 78

Moving on to step 5:
78 can be fit into 584 7 times, resulting in a remainder of 38.
Record the quotient 7 as the next digit in the result. 
Result so far: 827.0
If we take 546 away from 584, we end up with 38.
Bring next digit (5) of the dividend behind the 38 and repeat the process: 385 / 78

Advancing to step 6:
When dividing 385 by 78, we get 4 with a remainder of 73.
The number 4 becomes the next digit in our result. 
Result so far: 8274.0
If we subtract 312 from 385, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Going ahead to step 7:
78 can be fit into 730 9 times, resulting in a remainder of 28.
Put 9 as the next digit of the answer. 
Result so far: 8274.9
Subtracting 702 from 730 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 8:
78 goes into 280 3 times with a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 8274.93
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.

Let's proceed to step 9:
460 divided by 78 is 5 with a remainder of 70.
Write down 5 as next digit of the result. 
Result so far: 8274.935
Subtracting 390 from 460 leaves us 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.

Going ahead to step 10:
When dividing 700 by 78, we get 8 with a remainder of 76.
Put 8 as the next digit of the answer. 
Result so far: 8274.9358
The remainder is 76 after subtracting 624 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Moving on to step 11:
78 can be fit into 760 9 times, resulting in a remainder of 58.
Use 9 as the next digit of our solution. 
Result so far: 8274.93589
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.

On to step 12:
78 can be fit into 580 7 times, resulting in a remainder of 34.
Put 7 as the next digit of the answer. 
Result so far: 8274.935897
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 13:
340 divided by 78 is 4 with a remainder of 28.
Use 4 as the next digit of our solution. 
Result so far: 8274.9358974
The remainder is 28 after subtracting 312 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 14:
78 can be fit into 280 3 times, resulting in a remainder of 46.
Write down 3 as next digit of the result. 
Result so far: 8274.93589743
Subtracting 234 from 280 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.

In conclusion, the division gives 8274.93589743 with a balance of 4.6e-08.