We're dividing 16781513 by 645 
Let's see how many times 645 fits into 16781513.

Going ahead to step 1:
If we divide 1 by 645, we get 0 and a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 645

Step 2:
The number 645 fits into 16 0 times, leaving a remainder of 16.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Fetch the next digit (7) from the dividend, attach it to 16 and continue: 167 / 645

On to step 3:
When dividing 167 by 645, we get 0 with a remainder of 167.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 167 leaves us with 167.
Include the next digit (8) from the dividend after 167, then repeat: 1678 / 645

Advancing to step 4:
1678 divided by 645 is 2 with a remainder of 388.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 1290 from 1678, we get 388.
Bring next digit (1) of the dividend behind the 388 and repeat the process: 3881 / 645

Advancing to step 5:
The number 645 fits into 3881 6 times, leaving a remainder of 11.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
If we take 3870 away from 3881, we end up with 11.
Append the next digit (5) from the dividend to 11 and continue with: 115 / 645

Moving on to step 6:
115 divided by 645 is 0 with a remainder of 115.
The number 0 becomes the next digit in our result. 
Result so far: 260.0
Subtract 0 from 115 to get 115.
Take the next digit (1) from the dividend and append it to 115, then repeat: 1151 / 645

On to step 7:
1151 divided by 645 is 1 with a remainder of 506.
The number 1 becomes the next digit in our result. 
Result so far: 2601.0
If we subtract 645 from 1151, we get 506.
Bring next digit (3) of the dividend behind the 506 and repeat the process: 5063 / 645

Let's proceed to step 8:
645 can be fit into 5063 7 times, resulting in a remainder of 548.
Write down 7 as next digit of the result. 
Result so far: 26017.0
If we take 4515 away from 5063, we end up with 548.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5480, and continue the process.

Step 9:
645 goes into 5480 8 times with a remainder of 320.
Write down 8 as next digit of the result. 
Result so far: 26017.8
If we take 5160 away from 5480, we end up with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 10:
645 goes into 3200 4 times with a remainder of 620.
Use 4 as the next digit of our solution. 
Result so far: 26017.84
If we take 2580 away from 3200, we end up with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Let's proceed to step 11:
The number 645 fits into 6200 9 times, leaving a remainder of 395.
Write down 9 as next digit of the result. 
Result so far: 26017.849
If we take 5805 away from 6200, we end up with 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Let's proceed to step 12:
645 can be fit into 3950 6 times, resulting in a remainder of 80.
The number 6 becomes the next digit in our result. 
Result so far: 26017.8496
Deduct 3870 from 3950 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 13:
If we divide 800 by 645, we get 1 and a remainder of 155.
Use 1 as the next digit of our solution. 
Result so far: 26017.84961
If we subtract 645 from 800, we get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Going ahead to step 14:
When dividing 1550 by 645, we get 2 with a remainder of 260.
Record the quotient 2 as the next digit in the result. 
Result so far: 26017.849612
If we subtract 1290 from 1550, we get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Going ahead to step 15:
645 can be fit into 2600 4 times, resulting in a remainder of 20.
The next digit of our result is 4. 
Result so far: 26017.8496124
If we take 2580 away from 2600, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 16:
If we divide 200 by 645, we get 0 and a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 26017.8496124
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Our division results in 26017.8496124 with a remaining 2e-07.