We're dividing 53312943 by 645 
Let's see how many times 645 fits into 53312943.

Let's proceed to step 1:
The number 645 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 645

Step 2:
When dividing 53 by 645, we get 0 with a remainder of 53.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Bring next digit (3) of the dividend behind the 53 and repeat the process: 533 / 645

On to step 3:
When dividing 533 by 645, we get 0 with a remainder of 533.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 533, we end up with 533.
Append the next digit (1) from the dividend to 533 and continue with: 5331 / 645

Step 4:
When dividing 5331 by 645, we get 8 with a remainder of 171.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 171 after subtracting 5160 from 5331.
Bring next digit (2) of the dividend behind the 171 and repeat the process: 1712 / 645

On to step 5:
645 can be fit into 1712 2 times, resulting in a remainder of 422.
Use 2 as the next digit of our solution. 
Result so far: 82.0
The remainder is 422 after subtracting 1290 from 1712.
Take the next digit (9) from the dividend and append it to 422, then repeat: 4229 / 645

Advancing to step 6:
645 goes into 4229 6 times with a remainder of 359.
Put 6 as the next digit of the answer. 
Result so far: 826.0
The remainder is 359 after subtracting 3870 from 4229.
Fetch the next digit (4) from the dividend, attach it to 359 and continue: 3594 / 645

Let's proceed to step 7:
3594 divided by 645 is 5 with a remainder of 369.
Put 5 as the next digit of the answer. 
Result so far: 8265.0
If we subtract 3225 from 3594, we get 369.
Take the next digit (3) from the dividend and append it to 369, then repeat: 3693 / 645

Step 8:
645 goes into 3693 5 times with a remainder of 468.
The next digit of our result is 5. 
Result so far: 82655.0
The remainder is 468 after subtracting 3225 from 3693.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4680, and continue the process.

Step 9:
645 can be fit into 4680 7 times, resulting in a remainder of 165.
Record the quotient 7 as the next digit in the result. 
Result so far: 82655.7
Deduct 4515 from 4680 and we're left with 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Step 10:
645 can be fit into 1650 2 times, resulting in a remainder of 360.
Write down 2 as next digit of the result. 
Result so far: 82655.72
The remainder is 360 after subtracting 1290 from 1650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Advancing to step 11:
When dividing 3600 by 645, we get 5 with a remainder of 375.
The number 5 becomes the next digit in our result. 
Result so far: 82655.725
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 12:
3750 divided by 645 is 5 with a remainder of 525.
Record the quotient 5 as the next digit in the result. 
Result so far: 82655.7255
If we subtract 3225 from 3750, we get 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

In conclusion, the division gives 82655.7255 with a balance of 0.00525.