We divide 17987110 by 39
The aim is to understand the frequency of 39 in 17987110.

Let's proceed to step 1:
If we divide 1 by 39, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (7) from the dividend after 1, then repeat: 17 / 39

Advancing to step 2:
39 goes into 17 0 times with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 17 to get 17.
Bring next digit (9) of the dividend behind the 17 and repeat the process: 179 / 39

Let's proceed to step 3:
39 goes into 179 4 times with a remainder of 23.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 156 from 179 to get 23.
Append the next digit (8) from the dividend to 23 and continue with: 238 / 39

On to step 4:
The number 39 fits into 238 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 46.0
If we subtract 234 from 238, we get 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 39

Moving on to step 5:
If we divide 47 by 39, we get 1 and a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 461.0
Subtract 39 from 47 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 39

Going ahead to step 6:
When dividing 81 by 39, we get 2 with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 4612.0
The remainder is 3 after subtracting 78 from 81.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 39

Going ahead to step 7:
When dividing 31 by 39, we get 0 with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 46120.0
If we take 0 away from 31, we end up with 31.
Fetch the next digit (0) from the dividend, attach it to 31 and continue: 310 / 39

Going ahead to step 8:
310 divided by 39 is 7 with a remainder of 37.
Use 7 as the next digit of our solution. 
Result so far: 461207.0
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.

On to step 9:
39 goes into 370 9 times with a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 461207.9
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 10:
190 divided by 39 is 4 with a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 461207.94
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.

Advancing to step 11:
If we divide 340 by 39, we get 8 and a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 461207.948
If we subtract 312 from 340, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 12:
When dividing 280 by 39, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 461207.9487
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.

Step 13:
39 can be fit into 70 1 times, resulting in a remainder of 31.
Put 1 as the next digit of the answer. 
Result so far: 461207.94871
Subtracting 39 from 70 leaves us 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.

Let's proceed to step 14:
39 can be fit into 310 7 times, resulting in a remainder of 37.
The number 7 becomes the next digit in our result. 
Result so far: 461207.948717
Subtract 273 from 310 to 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.

Advancing to step 15:
370 divided by 39 is 9 with a remainder of 19.
Use 9 as the next digit of our solution. 
Result so far: 461207.9487179
Subtract 351 from 370 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.

Advancing to step 16:
When dividing 190 by 39, we get 4 with a remainder of 34.
The next digit of our result is 4. 
Result so far: 461207.94871794
The remainder is 34 after subtracting 156 from 190.
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 461207.94871794, with a leftover of 3.4e-08.