We divide 80171603 by 523
The aim is to understand the frequency of 523 in 80171603.

Going ahead to step 1:
The number 523 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 523

Going ahead to step 2:
523 goes into 80 0 times with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 523

Advancing to step 3:
If we divide 801 by 523, we get 1 and a remainder of 278.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 523 from 801, we get 278.
Include the next digit (7) from the dividend after 278, then repeat: 2787 / 523

On to step 4:
When dividing 2787 by 523, we get 5 with a remainder of 172.
Put 5 as the next digit of the answer. 
Result so far: 15.0
The remainder is 172 after subtracting 2615 from 2787.
Take the next digit (1) from the dividend and append it to 172, then repeat: 1721 / 523

Advancing to step 5:
1721 divided by 523 is 3 with a remainder of 152.
The next digit of our result is 3. 
Result so far: 153.0
The remainder is 152 after subtracting 1569 from 1721.
Take the next digit (6) from the dividend and append it to 152, then repeat: 1526 / 523

Let's proceed to step 6:
The number 523 fits into 1526 2 times, leaving a remainder of 480.
Record the quotient 2 as the next digit in the result. 
Result so far: 1532.0
Subtract 1046 from 1526 to get 480.
Append the next digit (0) from the dividend to 480 and continue with: 4800 / 523

Moving on to step 7:
523 goes into 4800 9 times with a remainder of 93.
Use 9 as the next digit of our solution. 
Result so far: 15329.0
Subtract 4707 from 4800 to get 93.
Take the next digit (3) from the dividend and append it to 93, then repeat: 933 / 523

Let's proceed to step 8:
933 divided by 523 is 1 with a remainder of 410.
Write down 1 as next digit of the result. 
Result so far: 153291.0
The remainder is 410 after subtracting 523 from 933.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

On to step 9:
523 can be fit into 4100 7 times, resulting in a remainder of 439.
Put 7 as the next digit of the answer. 
Result so far: 153291.7
If we take 3661 away from 4100, we end up with 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Advancing to step 10:
4390 divided by 523 is 8 with a remainder of 206.
Write down 8 as next digit of the result. 
Result so far: 153291.78
If we subtract 4184 from 4390, we get 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Step 11:
523 can be fit into 2060 3 times, resulting in a remainder of 491.
Record the quotient 3 as the next digit in the result. 
Result so far: 153291.783
Subtracting 1569 from 2060 leaves us with 491.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4910, and continue the process.

Advancing to step 12:
The number 523 fits into 4910 9 times, leaving a remainder of 203.
Put 9 as the next digit of the answer. 
Result so far: 153291.7839
If we subtract 4707 from 4910, we get 203.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2030, and continue the process.

On to step 13:
523 goes into 2030 3 times with a remainder of 461.
Record the quotient 3 as the next digit in the result. 
Result so far: 153291.78393
The remainder is 461 after subtracting 1569 from 2030.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4610, and continue the process.

Going ahead to step 14:
523 goes into 4610 8 times with a remainder of 426.
Write down 8 as next digit of the result. 
Result so far: 153291.783938
Subtract 4184 from 4610 to get 426.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4260, and continue the process.

Advancing to step 15:
523 can be fit into 4260 8 times, resulting in a remainder of 76.
The number 8 becomes the next digit in our result. 
Result so far: 153291.7839388
Subtracting 4184 from 4260 leaves us 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.

In conclusion, the division gives 153291.7839388 with a balance of 7.6e-07.