We're dividing 53981676 by 645 
We're looking to find how many times 645 goes into 53981676.

Going ahead to step 1:
645 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 645

Advancing to step 2:
645 goes into 53 0 times with a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 53, we get 53.
Grab the next digit (9) from the dividend, add it to 53, then carry on: 539 / 645

Step 3:
645 goes into 539 0 times with a remainder of 539.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 539 after subtracting 0 from 539.
Bring next digit (8) of the dividend behind the 539 and repeat the process: 5398 / 645

Moving on to step 4:
The number 645 fits into 5398 8 times, leaving a remainder of 238.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 5160 from 5398 and we're left with 238.
Bring next digit (1) of the dividend behind the 238 and repeat the process: 2381 / 645

On to step 5:
If we divide 2381 by 645, we get 3 and a remainder of 446.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
If we take 1935 away from 2381, we end up with 446.
Bring next digit (6) of the dividend behind the 446 and repeat the process: 4466 / 645

Going ahead to step 6:
4466 divided by 645 is 6 with a remainder of 596.
Write down 6 as next digit of the result. 
Result so far: 836.0
The remainder is 596 after subtracting 3870 from 4466.
Grab the next digit (7) from the dividend, add it to 596, then carry on: 5967 / 645

Let's proceed to step 7:
645 can be fit into 5967 9 times, resulting in a remainder of 162.
Use 9 as the next digit of our solution. 
Result so far: 8369.0
Subtracting 5805 from 5967 leaves us with 162.
Take the next digit (6) from the dividend and append it to 162, then repeat: 1626 / 645

Step 8:
If we divide 1626 by 645, we get 2 and a remainder of 336.
Write down 2 as next digit of the result. 
Result so far: 83692.0
The remainder is 336 after subtracting 1290 from 1626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

Step 9:
645 can be fit into 3360 5 times, resulting in a remainder of 135.
Use 5 as the next digit of our solution. 
Result so far: 83692.5
Subtract 3225 from 3360 to get 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

On to step 10:
When dividing 1350 by 645, we get 2 with a remainder of 60.
Record the quotient 2 as the next digit in the result. 
Result so far: 83692.52
Subtracting 1290 from 1350 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 11:
If we divide 600 by 645, we get 0 and a remainder of 600.
Put 0 as the next digit of the answer. 
Result so far: 83692.52
Subtract 0 from 600 to get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Let's proceed to step 12:
645 can be fit into 6000 9 times, resulting in a remainder of 195.
Write down 9 as next digit of the result. 
Result so far: 83692.5209
Subtracting 5805 from 6000 leaves us with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

On to step 13:
1950 divided by 645 is 3 with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 83692.52093
Subtract 1935 from 1950 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 14:
If we divide 150 by 645, we get 0 and a remainder of 150.
The next digit of our result is 0. 
Result so far: 83692.52093
The remainder is 150 after subtracting 0 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 15:
The number 645 fits into 1500 2 times, leaving a remainder of 210.
Use 2 as the next digit of our solution. 
Result so far: 83692.5209302
The remainder is 210 after subtracting 1290 from 1500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 16:
2100 divided by 645 is 3 with a remainder of 165.
Record the quotient 3 as the next digit in the result. 
Result so far: 83692.52093023
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.

The final result is 83692.52093023 with a remainder of 1.65e-07.