39720 divided by 37 
The aim is to understand the frequency of 37 in 39720.

Advancing to step 1:
3 divided by 37 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 37

Step 2:
If we divide 39 by 37, we get 1 and a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 37 from 39 leaves us with 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 37

Advancing to step 3:
37 goes into 27 0 times with a remainder of 27.
Put 0 as the next digit of the answer. 
Result so far: 10.0
If we subtract 0 from 27, we get 27.
Include the next digit (2) from the dividend after 27, then repeat: 272 / 37

Let's proceed to step 4:
272 divided by 37 is 7 with a remainder of 13.
The next digit of our result is 7. 
Result so far: 107.0
Subtracting 259 from 272 leaves us with 13.
Include the next digit (0) from the dividend after 13, then repeat: 130 / 37

Advancing to step 5:
The number 37 fits into 130 3 times, leaving a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 1073.0
Deduct 111 from 130 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 6:
37 goes into 190 5 times with a remainder of 5.
The next digit of our result is 5. 
Result so far: 1073.5
Deduct 185 from 190 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 7:
The number 37 fits into 50 1 times, leaving a remainder of 13.
The next digit of our result is 1. 
Result so far: 1073.51
Subtract 37 from 50 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 8:
130 divided by 37 is 3 with a remainder of 19.
The next digit of our result is 3. 
Result so far: 1073.513
The remainder is 19 after subtracting 111 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 9:
190 divided by 37 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 1073.5135
Subtract 185 from 190 to 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.

Step 10:
The number 37 fits into 50 1 times, leaving a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 1073.51351
Subtracting 37 from 50 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 11:
When dividing 130 by 37, we get 3 with a remainder of 19.
Use 3 as the next digit of our solution. 
Result so far: 1073.513513
Subtract 111 from 130 to get 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 12:
The number 37 fits into 190 5 times, leaving a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 1073.5135135
The remainder is 5 after subtracting 185 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 13:
If we divide 50 by 37, we get 1 and a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 1073.51351351
The remainder is 13 after subtracting 37 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

The final result is 1073.51351351 with a remainder of 1.3e-08.