We look at the division of 42809031 by 668 
We want to figure out the number of times 42809031 can be divided by 668.

On to step 1:
668 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 668

Step 2:
If we divide 42 by 668, we get 0 and a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Fetch the next digit (8) from the dividend, attach it to 42 and continue: 428 / 668

Advancing to step 3:
The number 668 fits into 428 0 times, leaving a remainder of 428.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 428 leaves us with 428.
Bring next digit (0) of the dividend behind the 428 and repeat the process: 4280 / 668

Advancing to step 4:
When dividing 4280 by 668, we get 6 with a remainder of 272.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Subtracting 4008 from 4280 leaves us with 272.
Fetch the next digit (9) from the dividend, attach it to 272 and continue: 2729 / 668

On to step 5:
When dividing 2729 by 668, we get 4 with a remainder of 57.
Write down 4 as next digit of the result. 
Result so far: 64.0
Subtracting 2672 from 2729 leaves us with 57.
Take the next digit (0) from the dividend and append it to 57, then repeat: 570 / 668

Moving on to step 6:
570 divided by 668 is 0 with a remainder of 570.
The number 0 becomes the next digit in our result. 
Result so far: 640.0
The remainder is 570 after subtracting 0 from 570.
Include the next digit (3) from the dividend after 570, then repeat: 5703 / 668

Let's proceed to step 7:
668 goes into 5703 8 times with a remainder of 359.
Record the quotient 8 as the next digit in the result. 
Result so far: 6408.0
Subtract 5344 from 5703 to get 359.
Grab the next digit (1) from the dividend, add it to 359, then carry on: 3591 / 668

Going ahead to step 8:
668 goes into 3591 5 times with a remainder of 251.
Write down 5 as next digit of the result. 
Result so far: 64085.0
The remainder is 251 after subtracting 3340 from 3591.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Moving on to step 9:
668 goes into 2510 3 times with a remainder of 506.
Put 3 as the next digit of the answer. 
Result so far: 64085.3
Subtracting 2004 from 2510 leaves us with 506.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5060, and continue the process.

Let's proceed to step 10:
668 goes into 5060 7 times with a remainder of 384.
The number 7 becomes the next digit in our result. 
Result so far: 64085.37
Deduct 4676 from 5060 and we're left with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Going ahead to step 11:
668 can be fit into 3840 5 times, resulting in a remainder of 500.
The next digit of our result is 5. 
Result so far: 64085.375
The remainder is 500 after subtracting 3340 from 3840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 12:
5000 divided by 668 is 7 with a remainder of 324.
Record the quotient 7 as the next digit in the result. 
Result so far: 64085.3757
If we subtract 4676 from 5000, we get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

On to step 13:
668 goes into 3240 4 times with a remainder of 568.
The next digit of our result is 4. 
Result so far: 64085.37574
Subtracting 2672 from 3240 leaves us 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.

Step 14:
5680 divided by 668 is 8 with a remainder of 336.
Use 8 as the next digit of our solution. 
Result so far: 64085.375748
If we take 5344 away from 5680, we end up with 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Going ahead to step 15:
3360 divided by 668 is 5 with a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 64085.3757485
The remainder is 20 after subtracting 3340 from 3360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 16:
668 can be fit into 200 0 times, resulting in a remainder of 200.
The number 0 becomes the next digit in our result. 
Result so far: 64085.3757485
Deduct 0 from 200 and we're left with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

In conclusion, the division gives 64085.3757485 with a balance of 2e-07.