63398990 divided by 10 
Our goal is to divide 63398990 by 10.

Going ahead to step 1:
If we divide 6 by 10, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 10

Moving on to step 2:
10 goes into 63 6 times with a remainder of 3.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 60 from 63 leaves us with 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 10

Let's proceed to step 3:
10 goes into 33 3 times with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
If we subtract 30 from 33, we get 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 10

Step 4:
10 can be fit into 39 3 times, resulting in a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 633.0
If we subtract 30 from 39, we get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 10

Going ahead to step 5:
98 divided by 10 is 9 with a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 6339.0
Deduct 90 from 98 and we're left with 8.
Append the next digit (9) from the dividend to 8 and continue with: 89 / 10

Step 6:
The number 10 fits into 89 8 times, leaving a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 63398.0
Deduct 80 from 89 and we're left with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 10

Advancing to step 7:
If we divide 99 by 10, we get 9 and a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 633989.0
Deduct 90 from 99 and we're left with 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 10

Advancing to step 8:
The number 10 fits into 90 9 times, leaving a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 6339899.0
Deduct 90 from 90 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.

Step 9:
The number 10 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 6339899.0
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.

Advancing to step 10:
The number 10 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 6339899.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 6339899.0 and a remainder of 0.0.