63534374 divided by 399 
Our goal is to divide 63534374 by 399.

Moving on to step 1:
The number 399 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 399

Let's proceed to step 2:
The number 399 fits into 63 0 times, leaving a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 63 and we're left with 63.
Bring next digit (5) of the dividend behind the 63 and repeat the process: 635 / 399

On to step 3:
When dividing 635 by 399, we get 1 with a remainder of 236.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 399 from 635 and we're left with 236.
Fetch the next digit (3) from the dividend, attach it to 236 and continue: 2363 / 399

Advancing to step 4:
When dividing 2363 by 399, we get 5 with a remainder of 368.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 1995 from 2363 and we're left with 368.
Fetch the next digit (4) from the dividend, attach it to 368 and continue: 3684 / 399

Step 5:
If we divide 3684 by 399, we get 9 and a remainder of 93.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
Subtract 3591 from 3684 to get 93.
Append the next digit (3) from the dividend to 93 and continue with: 933 / 399

Step 6:
If we divide 933 by 399, we get 2 and a remainder of 135.
The number 2 becomes the next digit in our result. 
Result so far: 1592.0
Subtract 798 from 933 to get 135.
Bring next digit (7) of the dividend behind the 135 and repeat the process: 1357 / 399

Let's proceed to step 7:
399 goes into 1357 3 times with a remainder of 160.
Write down 3 as next digit of the result. 
Result so far: 15923.0
The remainder is 160 after subtracting 1197 from 1357.
Bring next digit (4) of the dividend behind the 160 and repeat the process: 1604 / 399

Going ahead to step 8:
The number 399 fits into 1604 4 times, leaving a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 159234.0
Subtracting 1596 from 1604 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
When dividing 80 by 399, we get 0 with a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 159234.0
Subtracting 0 from 80 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 10:
800 divided by 399 is 2 with a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 159234.02
The remainder is 2 after subtracting 798 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
20 divided by 399 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 159234.02
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 12:
If we divide 200 by 399, we get 0 and a remainder of 200.
The next digit of our result is 0. 
Result so far: 159234.02
The remainder is 200 after subtracting 0 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Our division results in 159234.02 with a remaining 0.002.