We look at the division of 63880039 by 10 
The aim is to understand the frequency of 10 in 63880039.

Let's proceed to step 1:
When dividing 6 by 10, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 10

Let's proceed to step 2:
10 can be fit into 63 6 times, resulting in a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 6.0
If we subtract 60 from 63, we get 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 10

Advancing to step 3:
The number 10 fits into 38 3 times, leaving a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
If we subtract 30 from 38, we get 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 10

Let's proceed to step 4:
10 goes into 88 8 times with a remainder of 8.
The next digit of our result is 8. 
Result so far: 638.0
Subtracting 80 from 88 leaves us with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 10

Step 5:
10 goes into 80 8 times with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 6388.0
Subtract 80 from 80 to get 0.
Take the next digit (0) from the dividend and append it to 0, then repeat: 0 / 10

Step 6:
The number 10 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 63880.0
If we take 0 away from 0, we end up with 0.
Grab the next digit (3) from the dividend, add it to 0, then carry on: 3 / 10

Let's proceed to step 7:
3 divided by 10 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 638800.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 10

On to step 8:
The number 10 fits into 39 3 times, leaving a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 6388003.0
Subtract 30 from 39 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 9:
The number 10 fits into 90 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 6388003.9
Subtracting 90 from 90 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
0 divided by 10 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 6388003.9
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
0 divided by 10 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 6388003.9
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 6388003.9 with a remainder of 0.0.