18635613 ÷ 871 
Let's see how many times 871 fits into 18635613.

Step 1:
871 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 (8) from the dividend, attach it to 1 and continue: 18 / 871

Moving on to step 2:
871 can be fit into 18 0 times, resulting in a remainder of 18.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 18 after subtracting 0 from 18.
Take the next digit (6) from the dividend and append it to 18, then repeat: 186 / 871

Going ahead to step 3:
If we divide 186 by 871, we get 0 and a remainder of 186.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 186 and we're left with 186.
Append the next digit (3) from the dividend to 186 and continue with: 1863 / 871

Going ahead to step 4:
871 can be fit into 1863 2 times, resulting in a remainder of 121.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 121 after subtracting 1742 from 1863.
Fetch the next digit (5) from the dividend, attach it to 121 and continue: 1215 / 871

Step 5:
871 goes into 1215 1 times with a remainder of 344.
Use 1 as the next digit of our solution. 
Result so far: 21.0
If we subtract 871 from 1215, we get 344.
Bring next digit (6) of the dividend behind the 344 and repeat the process: 3446 / 871

Step 6:
871 can be fit into 3446 3 times, resulting in a remainder of 833.
The next digit of our result is 3. 
Result so far: 213.0
Deduct 2613 from 3446 and we're left with 833.
Grab the next digit (1) from the dividend, add it to 833, then carry on: 8331 / 871

Let's proceed to step 7:
871 goes into 8331 9 times with a remainder of 492.
Use 9 as the next digit of our solution. 
Result so far: 2139.0
Subtract 7839 from 8331 to get 492.
Include the next digit (3) from the dividend after 492, then repeat: 4923 / 871

Let's proceed to step 8:
4923 divided by 871 is 5 with a remainder of 568.
Use 5 as the next digit of our solution. 
Result so far: 21395.0
Deduct 4355 from 4923 and we're left with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Moving on to step 9:
871 goes into 5680 6 times with a remainder of 454.
Write down 6 as next digit of the result. 
Result so far: 21395.6
If we take 5226 away from 5680, we end up with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Going ahead to step 10:
When dividing 4540 by 871, we get 5 with a remainder of 185.
The number 5 becomes the next digit in our result. 
Result so far: 21395.65
If we take 4355 away from 4540, we end up with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 11:
871 can be fit into 1850 2 times, resulting in a remainder of 108.
Put 2 as the next digit of the answer. 
Result so far: 21395.652
If we subtract 1742 from 1850, we get 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Advancing to step 12:
When dividing 1080 by 871, we get 1 with a remainder of 209.
Write down 1 as next digit of the result. 
Result so far: 21395.6521
Subtracting 871 from 1080 leaves us with 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Advancing to step 13:
2090 divided by 871 is 2 with a remainder of 348.
Put 2 as the next digit of the answer. 
Result so far: 21395.65212
Subtracting 1742 from 2090 leaves us with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Going ahead to step 14:
If we divide 3480 by 871, we get 3 and a remainder of 867.
The next digit of our result is 3. 
Result so far: 21395.652123
Deduct 2613 from 3480 and we're left with 867.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8670, and continue the process.

On to step 15:
871 goes into 8670 9 times with a remainder of 831.
The next digit of our result is 9. 
Result so far: 21395.6521239
If we subtract 7839 from 8670, we get 831.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8310, and continue the process.

Advancing to step 16:
The number 871 fits into 8310 9 times, leaving a remainder of 471.
The next digit of our result is 9. 
Result so far: 21395.65212399
The remainder is 471 after subtracting 7839 from 8310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

The final result is 21395.65212399 with a remainder of 4.71e-07.