We look at the division of 80877378 by 945 
The aim is to understand the frequency of 945 in 80877378.

Step 1:
The number 945 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 945

On to step 2:
The number 945 fits into 80 0 times, leaving a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 80 leaves us with 80.
Grab the next digit (8) from the dividend, add it to 80, then carry on: 808 / 945

Advancing to step 3:
The number 945 fits into 808 0 times, leaving a remainder of 808.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 808 leaves us with 808.
Take the next digit (7) from the dividend and append it to 808, then repeat: 8087 / 945

Moving on to step 4:
8087 divided by 945 is 8 with a remainder of 527.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we subtract 7560 from 8087, we get 527.
Fetch the next digit (7) from the dividend, attach it to 527 and continue: 5277 / 945

Advancing to step 5:
5277 divided by 945 is 5 with a remainder of 552.
The next digit of our result is 5. 
Result so far: 85.0
Subtracting 4725 from 5277 leaves us with 552.
Grab the next digit (3) from the dividend, add it to 552, then carry on: 5523 / 945

Step 6:
If we divide 5523 by 945, we get 5 and a remainder of 798.
Use 5 as the next digit of our solution. 
Result so far: 855.0
The remainder is 798 after subtracting 4725 from 5523.
Include the next digit (7) from the dividend after 798, then repeat: 7987 / 945

Let's proceed to step 7:
945 can be fit into 7987 8 times, resulting in a remainder of 427.
The number 8 becomes the next digit in our result. 
Result so far: 8558.0
If we take 7560 away from 7987, we end up with 427.
Grab the next digit (8) from the dividend, add it to 427, then carry on: 4278 / 945

Going ahead to step 8:
945 goes into 4278 4 times with a remainder of 498.
Record the quotient 4 as the next digit in the result. 
Result so far: 85584.0
Subtract 3780 from 4278 to get 498.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4980, and continue the process.

Going ahead to step 9:
4980 divided by 945 is 5 with a remainder of 255.
The number 5 becomes the next digit in our result. 
Result so far: 85584.5
The remainder is 255 after subtracting 4725 from 4980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Advancing to step 10:
945 goes into 2550 2 times with a remainder of 660.
Use 2 as the next digit of our solution. 
Result so far: 85584.52
Deduct 1890 from 2550 and we're left with 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

Moving on to step 11:
945 can be fit into 6600 6 times, resulting in a remainder of 930.
Write down 6 as next digit of the result. 
Result so far: 85584.526
The remainder is 930 after subtracting 5670 from 6600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9300, and continue the process.

Step 12:
945 can be fit into 9300 9 times, resulting in a remainder of 795.
Record the quotient 9 as the next digit in the result. 
Result so far: 85584.5269
Subtract 8505 from 9300 to get 795.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7950, and continue the process.

Going ahead to step 13:
945 goes into 7950 8 times with a remainder of 390.
Put 8 as the next digit of the answer. 
Result so far: 85584.52698
Deduct 7560 from 7950 and we're left with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Going ahead to step 14:
The number 945 fits into 3900 4 times, leaving a remainder of 120.
Use 4 as the next digit of our solution. 
Result so far: 85584.526984
If we subtract 3780 from 3900, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 15:
If we divide 1200 by 945, we get 1 and a remainder of 255.
The next digit of our result is 1. 
Result so far: 85584.5269841
If we subtract 945 from 1200, we get 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Going ahead to step 16:
2550 divided by 945 is 2 with a remainder of 660.
Put 2 as the next digit of the answer. 
Result so far: 85584.52698412
The remainder is 660 after subtracting 1890 from 2550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6600, and continue the process.

The final result is 85584.52698412 with a remainder of 6.6e-07.