We divide 721186 by 39
The aim is to understand the frequency of 39 in 721186.

Going ahead to step 1:
If we divide 7 by 39, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (2) from the dividend after 7, then repeat: 72 / 39

Going ahead to step 2:
39 goes into 72 1 times with a remainder of 33.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 39 from 72 leaves us with 33.
Append the next digit (1) from the dividend to 33 and continue with: 331 / 39

Let's proceed to step 3:
If we divide 331 by 39, we get 8 and a remainder of 19.
Write down 8 as next digit of the result. 
Result so far: 18.0
The remainder is 19 after subtracting 312 from 331.
Append the next digit (1) from the dividend to 19 and continue with: 191 / 39

Going ahead to step 4:
If we divide 191 by 39, we get 4 and a remainder of 35.
Use 4 as the next digit of our solution. 
Result so far: 184.0
Subtract 156 from 191 to get 35.
Fetch the next digit (8) from the dividend, attach it to 35 and continue: 358 / 39

Moving on to step 5:
39 goes into 358 9 times with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 1849.0
The remainder is 7 after subtracting 351 from 358.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 39

Moving on to step 6:
The number 39 fits into 76 1 times, leaving a remainder of 37.
Write down 1 as next digit of the result. 
Result so far: 18491.0
If we take 39 away from 76, we end up with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 7:
If we divide 370 by 39, we get 9 and a remainder of 19.
Put 9 as the next digit of the answer. 
Result so far: 18491.9
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.

Step 8:
190 divided by 39 is 4 with a remainder of 34.
Write down 4 as next digit of the result. 
Result so far: 18491.94
Subtracting 156 from 190 leaves us 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.

Step 9:
If we divide 340 by 39, we get 8 and a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 18491.948
The remainder is 28 after subtracting 312 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 10:
280 divided by 39 is 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 18491.9487
Subtracting 273 from 280 leaves us 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.

On to step 11:
70 divided by 39 is 1 with a remainder of 31.
Record the quotient 1 as the next digit in the result. 
Result so far: 18491.94871
Deduct 39 from 70 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 12:
If we divide 310 by 39, we get 7 and a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 18491.948717
If we take 273 away from 310, we end up with 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 13:
39 goes into 370 9 times with a remainder of 19.
The next digit of our result is 9. 
Result so far: 18491.9487179
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 14:
39 can be fit into 190 4 times, resulting in a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 18491.94871794
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.

The final outcome is 18491.94871794, with a leftover of 3.4e-08.