We look at the division of 49578249 by 645 
We want to divide 49578249 by 645.

On to step 1:
4 divided by 645 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 645

Advancing to step 2:
When dividing 49 by 645, we get 0 with a remainder of 49.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 49 and we're left with 49.
Include the next digit (5) from the dividend after 49, then repeat: 495 / 645

Step 3:
495 divided by 645 is 0 with a remainder of 495.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 495 and we're left with 495.
Append the next digit (7) from the dividend to 495 and continue with: 4957 / 645

Let's proceed to step 4:
645 can be fit into 4957 7 times, resulting in a remainder of 442.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 4515 from 4957 leaves us with 442.
Take the next digit (8) from the dividend and append it to 442, then repeat: 4428 / 645

Let's proceed to step 5:
If we divide 4428 by 645, we get 6 and a remainder of 558.
Put 6 as the next digit of the answer. 
Result so far: 76.0
Deduct 3870 from 4428 and we're left with 558.
Append the next digit (2) from the dividend to 558 and continue with: 5582 / 645

On to step 6:
The number 645 fits into 5582 8 times, leaving a remainder of 422.
Put 8 as the next digit of the answer. 
Result so far: 768.0
Deduct 5160 from 5582 and we're left with 422.
Bring next digit (4) of the dividend behind the 422 and repeat the process: 4224 / 645

Advancing to step 7:
The number 645 fits into 4224 6 times, leaving a remainder of 354.
The number 6 becomes the next digit in our result. 
Result so far: 7686.0
If we take 3870 away from 4224, we end up with 354.
Include the next digit (9) from the dividend after 354, then repeat: 3549 / 645

Moving on to step 8:
The number 645 fits into 3549 5 times, leaving a remainder of 324.
Write down 5 as next digit of the result. 
Result so far: 76865.0
Deduct 3225 from 3549 and we're left with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

Going ahead to step 9:
645 can be fit into 3240 5 times, resulting in a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 76865.5
If we take 3225 away from 3240, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 10:
645 goes into 150 0 times with a remainder of 150.
The number 0 becomes the next digit in our result. 
Result so far: 76865.5
If we take 0 away from 150, we end up with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Moving on to step 11:
645 can be fit into 1500 2 times, resulting in a remainder of 210.
Use 2 as the next digit of our solution. 
Result so far: 76865.502
If we take 1290 away from 1500, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 12:
If we divide 2100 by 645, we get 3 and a remainder of 165.
The next digit of our result is 3. 
Result so far: 76865.5023
Subtract 1935 from 2100 to get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Let's proceed to step 13:
645 can be fit into 1650 2 times, resulting in a remainder of 360.
Put 2 as the next digit of the answer. 
Result so far: 76865.50232
Deduct 1290 from 1650 and we're left with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

On to step 14:
645 goes into 3600 5 times with a remainder of 375.
Write down 5 as next digit of the result. 
Result so far: 76865.502325
Deduct 3225 from 3600 and we're left with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Going ahead to step 15:
645 can be fit into 3750 5 times, resulting in a remainder of 525.
Write down 5 as next digit of the result. 
Result so far: 76865.5023255
If we take 3225 away from 3750, we end up with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

After the division, we end up with 76865.5023255 and a remainder of 5.25e-06.