We divide 18135421 by 663
We want to divide 18135421 by 663.

Going ahead to step 1:
The number 663 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 663

Going ahead to step 2:
If we divide 18 by 663, we get 0 and a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 18 leaves us with 18.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 663

Moving on to step 3:
When dividing 181 by 663, we get 0 with a remainder of 181.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 181 leaves us with 181.
Bring next digit (3) of the dividend behind the 181 and repeat the process: 1813 / 663

Step 4:
1813 divided by 663 is 2 with a remainder of 487.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 1326 from 1813 to get 487.
Append the next digit (5) from the dividend to 487 and continue with: 4875 / 663

On to step 5:
When dividing 4875 by 663, we get 7 with a remainder of 234.
Put 7 as the next digit of the answer. 
Result so far: 27.0
If we take 4641 away from 4875, we end up with 234.
Bring next digit (4) of the dividend behind the 234 and repeat the process: 2344 / 663

Moving on to step 6:
If we divide 2344 by 663, we get 3 and a remainder of 355.
Use 3 as the next digit of our solution. 
Result so far: 273.0
Deduct 1989 from 2344 and we're left with 355.
Grab the next digit (2) from the dividend, add it to 355, then carry on: 3552 / 663

Step 7:
The number 663 fits into 3552 5 times, leaving a remainder of 237.
Use 5 as the next digit of our solution. 
Result so far: 2735.0
Deduct 3315 from 3552 and we're left with 237.
Take the next digit (1) from the dividend and append it to 237, then repeat: 2371 / 663

On to step 8:
If we divide 2371 by 663, we get 3 and a remainder of 382.
Write down 3 as next digit of the result. 
Result so far: 27353.0
If we subtract 1989 from 2371, we get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Advancing to step 9:
When dividing 3820 by 663, we get 5 with a remainder of 505.
Put 5 as the next digit of the answer. 
Result so far: 27353.5
The remainder is 505 after subtracting 3315 from 3820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5050, and continue the process.

Let's proceed to step 10:
663 can be fit into 5050 7 times, resulting in a remainder of 409.
The next digit of our result is 7. 
Result so far: 27353.57
Subtracting 4641 from 5050 leaves us with 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Going ahead to step 11:
4090 divided by 663 is 6 with a remainder of 112.
Write down 6 as next digit of the result. 
Result so far: 27353.576
The remainder is 112 after subtracting 3978 from 4090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Going ahead to step 12:
The number 663 fits into 1120 1 times, leaving a remainder of 457.
The number 1 becomes the next digit in our result. 
Result so far: 27353.5761
If we subtract 663 from 1120, we get 457.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4570, and continue the process.

On to step 13:
4570 divided by 663 is 6 with a remainder of 592.
Write down 6 as next digit of the result. 
Result so far: 27353.57616
The remainder is 592 after subtracting 3978 from 4570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Going ahead to step 14:
663 goes into 5920 8 times with a remainder of 616.
The number 8 becomes the next digit in our result. 
Result so far: 27353.576168
If we subtract 5304 from 5920, we get 616.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6160, and continue the process.

Going ahead to step 15:
663 can be fit into 6160 9 times, resulting in a remainder of 193.
Write down 9 as next digit of the result. 
Result so far: 27353.5761689
If we take 5967 away from 6160, we end up with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Advancing to step 16:
If we divide 1930 by 663, we get 2 and a remainder of 604.
Record the quotient 2 as the next digit in the result. 
Result so far: 27353.57616892
Subtract 1326 from 1930 to get 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

The final outcome is 27353.57616892, with a leftover of 6.04e-07.