671842 divided by 39 
The aim is to understand the frequency of 39 in 671842.

On to step 1:
39 can be fit into 6 0 times, resulting in a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (7) of the dividend behind the 6 and repeat the process: 67 / 39

Step 2:
The number 39 fits into 67 1 times, leaving a remainder of 28.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 39 from 67, we get 28.
Fetch the next digit (1) from the dividend, attach it to 28 and continue: 281 / 39

Step 3:
When dividing 281 by 39, we get 7 with a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 17.0
Subtract 273 from 281 to get 8.
Take the next digit (8) from the dividend and append it to 8, then repeat: 88 / 39

Advancing to step 4:
The number 39 fits into 88 2 times, leaving a remainder of 10.
Use 2 as the next digit of our solution. 
Result so far: 172.0
The remainder is 10 after subtracting 78 from 88.
Include the next digit (4) from the dividend after 10, then repeat: 104 / 39

Going ahead to step 5:
104 divided by 39 is 2 with a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 1722.0
The remainder is 26 after subtracting 78 from 104.
Include the next digit (2) from the dividend after 26, then repeat: 262 / 39

Advancing to step 6:
When dividing 262 by 39, we get 6 with a remainder of 28.
The next digit of our result is 6. 
Result so far: 17226.0
If we take 234 away from 262, we end up 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.

Step 7:
39 goes into 280 7 times with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 17226.7
The remainder is 7 after subtracting 273 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 8:
The number 39 fits into 70 1 times, leaving a remainder of 31.
The next digit of our result is 1. 
Result so far: 17226.71
If we subtract 39 from 70, we get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Advancing to step 9:
If we divide 310 by 39, we get 7 and a remainder of 37.
Put 7 as the next digit of the answer. 
Result so far: 17226.717
If we subtract 273 from 310, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 10:
39 goes into 370 9 times with a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 17226.7179
Deduct 351 from 370 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 11:
When dividing 190 by 39, we get 4 with a remainder of 34.
The next digit of our result is 4. 
Result so far: 17226.71794
Deduct 156 from 190 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 12:
When dividing 340 by 39, we get 8 with a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 17226.717948
Subtracting 312 from 340 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.

Let's proceed to step 13:
If we divide 280 by 39, we get 7 and a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 17226.7179487
If we take 273 away from 280, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 14:
When dividing 70 by 39, we get 1 with a remainder of 31.
Use 1 as the next digit of our solution. 
Result so far: 17226.71794871
The remainder is 31 after subtracting 39 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The final outcome is 17226.71794871, with a leftover of 3.1e-08.