We're dividing 53147959 by 645 
Let's see how many times 645 fits into 53147959.

Advancing to step 1:
5 divided by 645 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (3) of the dividend behind the 5 and repeat the process: 53 / 645

Moving on to step 2:
If we divide 53 by 645, we get 0 and a remainder of 53.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Bring next digit (1) of the dividend behind the 53 and repeat the process: 531 / 645

Let's proceed to step 3:
645 goes into 531 0 times with a remainder of 531.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 531 leaves us with 531.
Take the next digit (4) from the dividend and append it to 531, then repeat: 5314 / 645

Going ahead to step 4:
If we divide 5314 by 645, we get 8 and a remainder of 154.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we take 5160 away from 5314, we end up with 154.
Append the next digit (7) from the dividend to 154 and continue with: 1547 / 645

Advancing to step 5:
645 can be fit into 1547 2 times, resulting in a remainder of 257.
Write down 2 as next digit of the result. 
Result so far: 82.0
Deduct 1290 from 1547 and we're left with 257.
Grab the next digit (9) from the dividend, add it to 257, then carry on: 2579 / 645

Step 6:
If we divide 2579 by 645, we get 3 and a remainder of 644.
The next digit of our result is 3. 
Result so far: 823.0
Subtract 1935 from 2579 to get 644.
Fetch the next digit (5) from the dividend, attach it to 644 and continue: 6445 / 645

Advancing to step 7:
6445 divided by 645 is 9 with a remainder of 640.
The next digit of our result is 9. 
Result so far: 8239.0
Subtract 5805 from 6445 to get 640.
Bring next digit (9) of the dividend behind the 640 and repeat the process: 6409 / 645

Step 8:
The number 645 fits into 6409 9 times, leaving a remainder of 604.
Use 9 as the next digit of our solution. 
Result so far: 82399.0
If we subtract 5805 from 6409, we get 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

On to step 9:
If we divide 6040 by 645, we get 9 and a remainder of 235.
The number 9 becomes the next digit in our result. 
Result so far: 82399.9
The remainder is 235 after subtracting 5805 from 6040.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

On to step 10:
When dividing 2350 by 645, we get 3 with a remainder of 415.
Use 3 as the next digit of our solution. 
Result so far: 82399.93
If we subtract 1935 from 2350, we get 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Moving on to step 11:
4150 divided by 645 is 6 with a remainder of 280.
Use 6 as the next digit of our solution. 
Result so far: 82399.936
Subtracting 3870 from 4150 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 12:
The number 645 fits into 2800 4 times, leaving a remainder of 220.
Use 4 as the next digit of our solution. 
Result so far: 82399.9364
Subtracting 2580 from 2800 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Advancing to step 13:
645 goes into 2200 3 times with a remainder of 265.
Use 3 as the next digit of our solution. 
Result so far: 82399.93643
Subtracting 1935 from 2200 leaves us with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

On to step 14:
When dividing 2650 by 645, we get 4 with a remainder of 70.
Record the quotient 4 as the next digit in the result. 
Result so far: 82399.936434
Subtracting 2580 from 2650 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 15:
The number 645 fits into 700 1 times, leaving a remainder of 55.
Write down 1 as next digit of the result. 
Result so far: 82399.9364341
Subtract 645 from 700 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 16:
645 can be fit into 550 0 times, resulting in a remainder of 550.
Put 0 as the next digit of the answer. 
Result so far: 82399.9364341
The remainder is 550 after subtracting 0 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

After the division, we end up with 82399.9364341 and a remainder of 5.5e-07.