73871765 divided by 13 
The aim is to understand the frequency of 13 in 73871765.

On to step 1:
If we divide 7 by 13, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 13

Step 2:
13 can be fit into 73 5 times, resulting in a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we subtract 65 from 73, we get 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 13

Advancing to step 3:
88 divided by 13 is 6 with a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 56.0
If we subtract 78 from 88, we get 10.
Bring next digit (7) of the dividend behind the 10 and repeat the process: 107 / 13

Going ahead to step 4:
When dividing 107 by 13, we get 8 with a remainder of 3.
The number 8 becomes the next digit in our result. 
Result so far: 568.0
If we subtract 104 from 107, we get 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 13

Step 5:
13 goes into 31 2 times with a remainder of 5.
The next digit of our result is 2. 
Result so far: 5682.0
Deduct 26 from 31 and we're left with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 13

Step 6:
When dividing 57 by 13, we get 4 with a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 56824.0
The remainder is 5 after subtracting 52 from 57.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 13

Going ahead to step 7:
If we divide 56 by 13, we get 4 and a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 568244.0
Subtract 52 from 56 to get 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 13

On to step 8:
If we divide 45 by 13, we get 3 and a remainder of 6.
The next digit of our result is 3. 
Result so far: 5682443.0
Deduct 39 from 45 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
The number 13 fits into 60 4 times, leaving a remainder of 8.
Use 4 as the next digit of our solution. 
Result so far: 5682443.4
Deduct 52 from 60 and we're left 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.

Moving on to step 10:
If we divide 80 by 13, we get 6 and a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 5682443.46
Deduct 78 from 80 and we're left 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.

On to step 11:
13 goes into 20 1 times with a remainder of 7.
Use 1 as the next digit of our solution. 
Result so far: 5682443.461
The remainder is 7 after subtracting 13 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 12:
The number 13 fits into 70 5 times, leaving a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 5682443.4615
If we subtract 65 from 70, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 13:
13 can be fit into 50 3 times, resulting in a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 5682443.46153
Subtract 39 from 50 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 14:
13 can be fit into 110 8 times, resulting in a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 5682443.461538
The remainder is 6 after subtracting 104 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 15:
The number 13 fits into 60 4 times, leaving a remainder of 8.
The next digit of our result is 4. 
Result so far: 5682443.4615384
Deduct 52 from 60 and we're left 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.

Going ahead to step 16:
13 goes into 80 6 times with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 5682443.46153846
If we take 78 away from 80, we end up 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.

After the division, we end up with 5682443.46153846 and a remainder of 2e-09.