We look at the division of 648040 by 42 
We're looking to find how many times 42 goes into 648040.

Advancing to step 1:
When dividing 6 by 42, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 42

Advancing to step 2:
42 can be fit into 64 1 times, resulting in a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 42 from 64, we get 22.
Grab the next digit (8) from the dividend, add it to 22, then carry on: 228 / 42

Step 3:
42 can be fit into 228 5 times, resulting in a remainder of 18.
Write down 5 as next digit of the result. 
Result so far: 15.0
Subtract 210 from 228 to get 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 42

Going ahead to step 4:
180 divided by 42 is 4 with a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 154.0
Subtract 168 from 180 to get 12.
Take the next digit (4) from the dividend and append it to 12, then repeat: 124 / 42

Going ahead to step 5:
124 divided by 42 is 2 with a remainder of 40.
The next digit of our result is 2. 
Result so far: 1542.0
Subtracting 84 from 124 leaves us with 40.
Include the next digit (0) from the dividend after 40, then repeat: 400 / 42

Step 6:
42 can be fit into 400 9 times, resulting in a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 15429.0
If we take 378 away from 400, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Advancing to step 7:
When dividing 220 by 42, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 15429.5
Deduct 210 from 220 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
If we divide 100 by 42, we get 2 and a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 15429.52
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
160 divided by 42 is 3 with a remainder of 34.
Use 3 as the next digit of our solution. 
Result so far: 15429.523
Deduct 126 from 160 and we're left with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 10:
340 divided by 42 is 8 with a remainder of 4.
Write down 8 as next digit of the result. 
Result so far: 15429.5238
If we subtract 336 from 340, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
40 divided by 42 is 0 with a remainder of 40.
The number 0 becomes the next digit in our result. 
Result so far: 15429.5238
If we subtract 0 from 40, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 12:
When dividing 400 by 42, we get 9 with a remainder of 22.
The number 9 becomes the next digit in our result. 
Result so far: 15429.523809
Subtract 378 from 400 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Going ahead to step 13:
The number 42 fits into 220 5 times, leaving a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 15429.5238095
If we take 210 away from 220, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 14:
The number 42 fits into 100 2 times, leaving a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 15429.52380952
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Our division results in 15429.52380952 with a remaining 1.6e-08.