We look at the division of 40890016 by 621 
Let's see how many times 621 fits into 40890016.

On to step 1:
621 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 621

Going ahead to step 2:
621 goes into 40 0 times with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Take the next digit (8) from the dividend and append it to 40, then repeat: 408 / 621

Moving on to step 3:
The number 621 fits into 408 0 times, leaving a remainder of 408.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 408 after subtracting 0 from 408.
Fetch the next digit (9) from the dividend, attach it to 408 and continue: 4089 / 621

Let's proceed to step 4:
If we divide 4089 by 621, we get 6 and a remainder of 363.
Put 6 as the next digit of the answer. 
Result so far: 6.0
The remainder is 363 after subtracting 3726 from 4089.
Grab the next digit (0) from the dividend, add it to 363, then carry on: 3630 / 621

Advancing to step 5:
621 goes into 3630 5 times with a remainder of 525.
The next digit of our result is 5. 
Result so far: 65.0
If we take 3105 away from 3630, we end up with 525.
Grab the next digit (0) from the dividend, add it to 525, then carry on: 5250 / 621

On to step 6:
The number 621 fits into 5250 8 times, leaving a remainder of 282.
The next digit of our result is 8. 
Result so far: 658.0
Subtract 4968 from 5250 to get 282.
Fetch the next digit (1) from the dividend, attach it to 282 and continue: 2821 / 621

Going ahead to step 7:
If we divide 2821 by 621, we get 4 and a remainder of 337.
The number 4 becomes the next digit in our result. 
Result so far: 6584.0
If we subtract 2484 from 2821, we get 337.
Take the next digit (6) from the dividend and append it to 337, then repeat: 3376 / 621

Advancing to step 8:
The number 621 fits into 3376 5 times, leaving a remainder of 271.
The number 5 becomes the next digit in our result. 
Result so far: 65845.0
Subtract 3105 from 3376 to get 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Advancing to step 9:
621 can be fit into 2710 4 times, resulting in a remainder of 226.
The next digit of our result is 4. 
Result so far: 65845.4
If we take 2484 away from 2710, we end up with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Advancing to step 10:
2260 divided by 621 is 3 with a remainder of 397.
The next digit of our result is 3. 
Result so far: 65845.43
The remainder is 397 after subtracting 1863 from 2260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Going ahead to step 11:
The number 621 fits into 3970 6 times, leaving a remainder of 244.
Write down 6 as next digit of the result. 
Result so far: 65845.436
Subtract 3726 from 3970 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Going ahead to step 12:
The number 621 fits into 2440 3 times, leaving a remainder of 577.
The number 3 becomes the next digit in our result. 
Result so far: 65845.4363
Subtracting 1863 from 2440 leaves us with 577.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5770, and continue the process.

Let's proceed to step 13:
When dividing 5770 by 621, we get 9 with a remainder of 181.
Write down 9 as next digit of the result. 
Result so far: 65845.43639
Deduct 5589 from 5770 and we're left with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

Let's proceed to step 14:
The number 621 fits into 1810 2 times, leaving a remainder of 568.
Write down 2 as next digit of the result. 
Result so far: 65845.436392
Deduct 1242 from 1810 and we're left 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.

On to step 15:
5680 divided by 621 is 9 with a remainder of 91.
Write down 9 as next digit of the result. 
Result so far: 65845.4363929
The remainder is 91 after subtracting 5589 from 5680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Let's proceed to step 16:
621 can be fit into 910 1 times, resulting in a remainder of 289.
Use 1 as the next digit of our solution. 
Result so far: 65845.43639291
Subtracting 621 from 910 leaves us with 289.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2890, and continue the process.

In conclusion, the division gives 65845.43639291 with a balance of 2.89e-07.