39705573 divided by 639 
The aim is to understand the frequency of 639 in 39705573.

Advancing to step 1:
The number 639 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 639

Going ahead to step 2:
39 divided by 639 is 0 with a remainder of 39.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Grab the next digit (7) from the dividend, add it to 39, then carry on: 397 / 639

Let's proceed to step 3:
The number 639 fits into 397 0 times, leaving a remainder of 397.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 397 to get 397.
Fetch the next digit (0) from the dividend, attach it to 397 and continue: 3970 / 639

Advancing to step 4:
639 can be fit into 3970 6 times, resulting in a remainder of 136.
Use 6 as the next digit of our solution. 
Result so far: 6.0
Subtract 3834 from 3970 to get 136.
Include the next digit (5) from the dividend after 136, then repeat: 1365 / 639

Advancing to step 5:
639 can be fit into 1365 2 times, resulting in a remainder of 87.
The number 2 becomes the next digit in our result. 
Result so far: 62.0
Deduct 1278 from 1365 and we're left with 87.
Fetch the next digit (5) from the dividend, attach it to 87 and continue: 875 / 639

Advancing to step 6:
639 goes into 875 1 times with a remainder of 236.
The next digit of our result is 1. 
Result so far: 621.0
If we take 639 away from 875, we end up with 236.
Take the next digit (7) from the dividend and append it to 236, then repeat: 2367 / 639

On to step 7:
The number 639 fits into 2367 3 times, leaving a remainder of 450.
Record the quotient 3 as the next digit in the result. 
Result so far: 6213.0
Deduct 1917 from 2367 and we're left with 450.
Bring next digit (3) of the dividend behind the 450 and repeat the process: 4503 / 639

Let's proceed to step 8:
If we divide 4503 by 639, we get 7 and a remainder of 30.
The next digit of our result is 7. 
Result so far: 62137.0
Deduct 4473 from 4503 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
300 divided by 639 is 0 with a remainder of 300.
Write down 0 as next digit of the result. 
Result so far: 62137.0
The remainder is 300 after subtracting 0 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Going ahead to step 10:
639 goes into 3000 4 times with a remainder of 444.
The next digit of our result is 4. 
Result so far: 62137.04
Subtracting 2556 from 3000 leaves us with 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Going ahead to step 11:
639 goes into 4440 6 times with a remainder of 606.
Record the quotient 6 as the next digit in the result. 
Result so far: 62137.046
Subtracting 3834 from 4440 leaves us with 606.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6060, and continue the process.

Moving on to step 12:
639 goes into 6060 9 times with a remainder of 309.
Use 9 as the next digit of our solution. 
Result so far: 62137.0469
Subtract 5751 from 6060 to get 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Advancing to step 13:
When dividing 3090 by 639, we get 4 with a remainder of 534.
Put 4 as the next digit of the answer. 
Result so far: 62137.04694
If we subtract 2556 from 3090, we get 534.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5340, and continue the process.

Advancing to step 14:
The number 639 fits into 5340 8 times, leaving a remainder of 228.
Record the quotient 8 as the next digit in the result. 
Result so far: 62137.046948
If we subtract 5112 from 5340, we get 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Step 15:
639 goes into 2280 3 times with a remainder of 363.
Put 3 as the next digit of the answer. 
Result so far: 62137.0469483
If we subtract 1917 from 2280, we get 363.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3630, and continue the process.

Going ahead to step 16:
When dividing 3630 by 639, we get 5 with a remainder of 435.
Record the quotient 5 as the next digit in the result. 
Result so far: 62137.04694835
If we take 3195 away from 3630, we end up with 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

The final outcome is 62137.04694835, with a leftover of 4.35e-07.