We look at the division of 40620988 by 12 
Our goal is to divide 40620988 by 12.

Going ahead to step 1:
If we divide 4 by 12, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 12

On to step 2:
If we divide 40 by 12, we get 3 and a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 36 from 40 to get 4.
Bring next digit (6) of the dividend behind the 4 and repeat the process: 46 / 12

Advancing to step 3:
If we divide 46 by 12, we get 3 and a remainder of 10.
The next digit of our result is 3. 
Result so far: 33.0
Deduct 36 from 46 and we're left with 10.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 12

Step 4:
12 can be fit into 102 8 times, resulting in a remainder of 6.
The next digit of our result is 8. 
Result so far: 338.0
Subtract 96 from 102 to get 6.
Grab the next digit (0) from the dividend, add it to 6, then carry on: 60 / 12

On to step 5:
60 divided by 12 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 3385.0
If we subtract 60 from 60, we get 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 12

Step 6:
If we divide 9 by 12, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 33850.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 12

Moving on to step 7:
12 can be fit into 98 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 338508.0
If we take 96 away from 98, we end up with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 12

Moving on to step 8:
The number 12 fits into 28 2 times, leaving a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 3385082.0
Subtracting 24 from 28 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
When dividing 40 by 12, we get 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3385082.3
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 3385082.33
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 3385082.33 with a remaining 0.004.