We're dividing 663818 by 42 
We want to divide 663818 by 42.

Advancing to step 1:
If we divide 6 by 42, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 42

On to step 2:
If we divide 66 by 42, we get 1 and a remainder of 24.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 42 from 66 and we're left with 24.
Append the next digit (3) from the dividend to 24 and continue with: 243 / 42

Advancing to step 3:
42 can be fit into 243 5 times, resulting in a remainder of 33.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Deduct 210 from 243 and we're left with 33.
Include the next digit (8) from the dividend after 33, then repeat: 338 / 42

Step 4:
The number 42 fits into 338 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 158.0
Subtract 336 from 338 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 42

Step 5:
42 goes into 21 0 times with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 1580.0
If we subtract 0 from 21, we get 21.
Grab the next digit (8) from the dividend, add it to 21, then carry on: 218 / 42

Let's proceed to step 6:
The number 42 fits into 218 5 times, leaving a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 15805.0
If we subtract 210 from 218, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
The number 42 fits into 80 1 times, leaving a remainder of 38.
The next digit of our result is 1. 
Result so far: 15805.1
Deduct 42 from 80 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Let's proceed to step 8:
42 can be fit into 380 9 times, resulting in a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 15805.19
Subtracting 378 from 380 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
When dividing 20 by 42, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 15805.19
If we take 0 away from 20, we end up with 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 10:
42 goes into 200 4 times with a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 15805.1904
If we take 168 away from 200, we end up 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.

Going ahead to step 11:
42 can be fit into 320 7 times, resulting in a remainder of 26.
The next digit of our result is 7. 
Result so far: 15805.19047
Subtract 294 from 320 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 12:
42 can be fit into 260 6 times, resulting in a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 15805.190476
Subtract 252 from 260 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
The number 42 fits into 80 1 times, leaving a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 15805.1904761
Subtracting 42 from 80 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 14:
42 can be fit into 380 9 times, resulting in a remainder of 2.
Use 9 as the next digit of our solution. 
Result so far: 15805.19047619
If we take 378 away from 380, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 15805.19047619 with a remaining 2e-09.