We divide 87209936 by 169
The aim is to understand the frequency of 169 in 87209936.

On to step 1:
The number 169 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 169

Advancing to step 2:
87 divided by 169 is 0 with a remainder of 87.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 87 and we're left with 87.
Append the next digit (2) from the dividend to 87 and continue with: 872 / 169

Advancing to step 3:
169 can be fit into 872 5 times, resulting in a remainder of 27.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 845 from 872 leaves us with 27.
Append the next digit (0) from the dividend to 27 and continue with: 270 / 169

Going ahead to step 4:
169 goes into 270 1 times with a remainder of 101.
Write down 1 as next digit of the result. 
Result so far: 51.0
If we subtract 169 from 270, we get 101.
Append the next digit (9) from the dividend to 101 and continue with: 1019 / 169

Advancing to step 5:
When dividing 1019 by 169, we get 6 with a remainder of 5.
The number 6 becomes the next digit in our result. 
Result so far: 516.0
The remainder is 5 after subtracting 1014 from 1019.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 169

Let's proceed to step 6:
If we divide 59 by 169, we get 0 and a remainder of 59.
Record the quotient 0 as the next digit in the result. 
Result so far: 5160.0
If we subtract 0 from 59, we get 59.
Take the next digit (3) from the dividend and append it to 59, then repeat: 593 / 169

Advancing to step 7:
When dividing 593 by 169, we get 3 with a remainder of 86.
The number 3 becomes the next digit in our result. 
Result so far: 51603.0
Deduct 507 from 593 and we're left with 86.
Append the next digit (6) from the dividend to 86 and continue with: 866 / 169

Going ahead to step 8:
169 can be fit into 866 5 times, resulting in a remainder of 21.
Write down 5 as next digit of the result. 
Result so far: 516035.0
The remainder is 21 after subtracting 845 from 866.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 9:
When dividing 210 by 169, we get 1 with a remainder of 41.
Put 1 as the next digit of the answer. 
Result so far: 516035.1
The remainder is 41 after subtracting 169 from 210.
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 10:
410 divided by 169 is 2 with a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 516035.12
Deduct 338 from 410 and we're left with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 11:
If we divide 720 by 169, we get 4 and a remainder of 44.
Use 4 as the next digit of our solution. 
Result so far: 516035.124
If we take 676 away from 720, 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.

Advancing to step 12:
169 goes into 440 2 times with a remainder of 102.
The number 2 becomes the next digit in our result. 
Result so far: 516035.1242
The remainder is 102 after subtracting 338 from 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

On to step 13:
If we divide 1020 by 169, we get 6 and a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 516035.12426
Subtract 1014 from 1020 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 14:
The number 169 fits into 60 0 times, leaving a remainder of 60.
Put 0 as the next digit of the answer. 
Result so far: 516035.12426
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 15:
When dividing 600 by 169, we get 3 with a remainder of 93.
The next digit of our result is 3. 
Result so far: 516035.1242603
If we take 507 away from 600, we end up with 93.
Since there are no more digits in the dividend, we add a zero to the remainder making it 930, and continue the process.

Moving on to step 16:
169 goes into 930 5 times with a remainder of 85.
Write down 5 as next digit of the result. 
Result so far: 516035.12426035
Subtract 845 from 930 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

The final outcome is 516035.12426035, with a leftover of 8.5e-08.