We look at the division of 13511517 by 421 
Our goal is to divide 13511517 by 421.

Step 1:
421 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 421

Let's proceed to step 2:
The number 421 fits into 13 0 times, leaving a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 13 leaves us with 13.
Include the next digit (5) from the dividend after 13, then repeat: 135 / 421

Moving on to step 3:
135 divided by 421 is 0 with a remainder of 135.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 135, we end up with 135.
Take the next digit (1) from the dividend and append it to 135, then repeat: 1351 / 421

Step 4:
When dividing 1351 by 421, we get 3 with a remainder of 88.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 1263 from 1351 leaves us with 88.
Bring next digit (1) of the dividend behind the 88 and repeat the process: 881 / 421

Moving on to step 5:
421 goes into 881 2 times with a remainder of 39.
Write down 2 as next digit of the result. 
Result so far: 32.0
Subtracting 842 from 881 leaves us with 39.
Bring next digit (5) of the dividend behind the 39 and repeat the process: 395 / 421

Step 6:
395 divided by 421 is 0 with a remainder of 395.
The number 0 becomes the next digit in our result. 
Result so far: 320.0
Subtracting 0 from 395 leaves us with 395.
Append the next digit (1) from the dividend to 395 and continue with: 3951 / 421

Going ahead to step 7:
The number 421 fits into 3951 9 times, leaving a remainder of 162.
Write down 9 as next digit of the result. 
Result so far: 3209.0
Subtract 3789 from 3951 to get 162.
Append the next digit (7) from the dividend to 162 and continue with: 1627 / 421

On to step 8:
1627 divided by 421 is 3 with a remainder of 364.
The number 3 becomes the next digit in our result. 
Result so far: 32093.0
Subtracting 1263 from 1627 leaves us with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

On to step 9:
3640 divided by 421 is 8 with a remainder of 272.
Write down 8 as next digit of the result. 
Result so far: 32093.8
If we subtract 3368 from 3640, we get 272.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Going ahead to step 10:
2720 divided by 421 is 6 with a remainder of 194.
Put 6 as the next digit of the answer. 
Result so far: 32093.86
Subtracting 2526 from 2720 leaves us with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Step 11:
The number 421 fits into 1940 4 times, leaving a remainder of 256.
Record the quotient 4 as the next digit in the result. 
Result so far: 32093.864
If we subtract 1684 from 1940, we get 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 12:
421 can be fit into 2560 6 times, resulting in a remainder of 34.
Use 6 as the next digit of our solution. 
Result so far: 32093.8646
If we subtract 2526 from 2560, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 13:
The number 421 fits into 340 0 times, leaving a remainder of 340.
Put 0 as the next digit of the answer. 
Result so far: 32093.8646
Subtract 0 from 340 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 14:
The number 421 fits into 3400 8 times, leaving a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 32093.864608
Deduct 3368 from 3400 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 15:
421 can be fit into 320 0 times, resulting in a remainder of 320.
The next digit of our result is 0. 
Result so far: 32093.864608
If we take 0 away from 320, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 16:
421 can be fit into 3200 7 times, resulting in a remainder of 253.
Use 7 as the next digit of our solution. 
Result so far: 32093.86460807
The remainder is 253 after subtracting 2947 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Our division results in 32093.86460807 with a remaining 2.53e-07.