40895559 ÷ 645 
We want to divide 40895559 by 645.

On to step 1:
645 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 645

Step 2:
645 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Bring next digit (8) of the dividend behind the 40 and repeat the process: 408 / 645

Moving on to step 3:
408 divided by 645 is 0 with a remainder of 408.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 408, we end up with 408.
Take the next digit (9) from the dividend and append it to 408, then repeat: 4089 / 645

Advancing to step 4:
645 can be fit into 4089 6 times, resulting in a remainder of 219.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
If we subtract 3870 from 4089, we get 219.
Take the next digit (5) from the dividend and append it to 219, then repeat: 2195 / 645

Let's proceed to step 5:
The number 645 fits into 2195 3 times, leaving a remainder of 260.
The next digit of our result is 3. 
Result so far: 63.0
The remainder is 260 after subtracting 1935 from 2195.
Include the next digit (5) from the dividend after 260, then repeat: 2605 / 645

Going ahead to step 6:
645 can be fit into 2605 4 times, resulting in a remainder of 25.
Write down 4 as next digit of the result. 
Result so far: 634.0
Subtracting 2580 from 2605 leaves us with 25.
Append the next digit (5) from the dividend to 25 and continue with: 255 / 645

Step 7:
When dividing 255 by 645, we get 0 with a remainder of 255.
Write down 0 as next digit of the result. 
Result so far: 6340.0
If we subtract 0 from 255, we get 255.
Fetch the next digit (9) from the dividend, attach it to 255 and continue: 2559 / 645

Step 8:
2559 divided by 645 is 3 with a remainder of 624.
The next digit of our result is 3. 
Result so far: 63403.0
Subtract 1935 from 2559 to get 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

On to step 9:
645 goes into 6240 9 times with a remainder of 435.
Write down 9 as next digit of the result. 
Result so far: 63403.9
Deduct 5805 from 6240 and we're left with 435.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4350, and continue the process.

Let's proceed to step 10:
4350 divided by 645 is 6 with a remainder of 480.
The next digit of our result is 6. 
Result so far: 63403.96
Subtract 3870 from 4350 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 11:
When dividing 4800 by 645, we get 7 with a remainder of 285.
Record the quotient 7 as the next digit in the result. 
Result so far: 63403.967
Subtracting 4515 from 4800 leaves us with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Going ahead to step 12:
2850 divided by 645 is 4 with a remainder of 270.
Put 4 as the next digit of the answer. 
Result so far: 63403.9674
If we subtract 2580 from 2850, we get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Step 13:
2700 divided by 645 is 4 with a remainder of 120.
The number 4 becomes the next digit in our result. 
Result so far: 63403.96744
If we take 2580 away from 2700, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

The final result is 63403.96744 with a remainder of 0.00012.