We look at the division of 63914648 by 421 
Let's see how many times 421 fits into 63914648.

Advancing to step 1:
421 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 421

Going ahead to step 2:
421 goes into 63 0 times with a remainder of 63.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 63, we end up with 63.
Include the next digit (9) from the dividend after 63, then repeat: 639 / 421

Step 3:
421 goes into 639 1 times with a remainder of 218.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 421 from 639 and we're left with 218.
Fetch the next digit (1) from the dividend, attach it to 218 and continue: 2181 / 421

Step 4:
421 goes into 2181 5 times with a remainder of 76.
The next digit of our result is 5. 
Result so far: 15.0
If we take 2105 away from 2181, we end up with 76.
Grab the next digit (4) from the dividend, add it to 76, then carry on: 764 / 421

Moving on to step 5:
If we divide 764 by 421, we get 1 and a remainder of 343.
Write down 1 as next digit of the result. 
Result so far: 151.0
Deduct 421 from 764 and we're left with 343.
Grab the next digit (6) from the dividend, add it to 343, then carry on: 3436 / 421

Step 6:
421 can be fit into 3436 8 times, resulting in a remainder of 68.
Put 8 as the next digit of the answer. 
Result so far: 1518.0
The remainder is 68 after subtracting 3368 from 3436.
Bring next digit (4) of the dividend behind the 68 and repeat the process: 684 / 421

Moving on to step 7:
421 can be fit into 684 1 times, resulting in a remainder of 263.
The number 1 becomes the next digit in our result. 
Result so far: 15181.0
If we subtract 421 from 684, we get 263.
Append the next digit (8) from the dividend to 263 and continue with: 2638 / 421

Advancing to step 8:
2638 divided by 421 is 6 with a remainder of 112.
Record the quotient 6 as the next digit in the result. 
Result so far: 151816.0
Deduct 2526 from 2638 and we're left with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 9:
421 goes into 1120 2 times with a remainder of 278.
The next digit of our result is 2. 
Result so far: 151816.2
Subtracting 842 from 1120 leaves us with 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

On to step 10:
If we divide 2780 by 421, we get 6 and a remainder of 254.
Record the quotient 6 as the next digit in the result. 
Result so far: 151816.26
Subtracting 2526 from 2780 leaves us with 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Advancing to step 11:
421 goes into 2540 6 times with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 151816.266
The remainder is 14 after subtracting 2526 from 2540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 151816.266 and a remainder of 0.0014.