We divide 53573049 by 645
We want to divide 53573049 by 645.

Let's proceed to step 1:
5 divided by 645 is 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 645

Step 2:
645 can be fit into 53 0 times, resulting in a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Take the next digit (5) from the dividend and append it to 53, then repeat: 535 / 645

On to step 3:
When dividing 535 by 645, we get 0 with a remainder of 535.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 535 after subtracting 0 from 535.
Include the next digit (7) from the dividend after 535, then repeat: 5357 / 645

Advancing to step 4:
The number 645 fits into 5357 8 times, leaving a remainder of 197.
Use 8 as the next digit of our solution. 
Result so far: 8.0
The remainder is 197 after subtracting 5160 from 5357.
Append the next digit (3) from the dividend to 197 and continue with: 1973 / 645

On to step 5:
1973 divided by 645 is 3 with a remainder of 38.
Use 3 as the next digit of our solution. 
Result so far: 83.0
Subtract 1935 from 1973 to get 38.
Take the next digit (0) from the dividend and append it to 38, then repeat: 380 / 645

Step 6:
The number 645 fits into 380 0 times, leaving a remainder of 380.
Write down 0 as next digit of the result. 
Result so far: 830.0
If we take 0 away from 380, we end up with 380.
Grab the next digit (4) from the dividend, add it to 380, then carry on: 3804 / 645

Going ahead to step 7:
645 goes into 3804 5 times with a remainder of 579.
Record the quotient 5 as the next digit in the result. 
Result so far: 8305.0
Deduct 3225 from 3804 and we're left with 579.
Fetch the next digit (9) from the dividend, attach it to 579 and continue: 5799 / 645

Let's proceed to step 8:
The number 645 fits into 5799 8 times, leaving a remainder of 639.
The next digit of our result is 8. 
Result so far: 83058.0
Deduct 5160 from 5799 and we're left with 639.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6390, and continue the process.

Going ahead to step 9:
6390 divided by 645 is 9 with a remainder of 585.
Use 9 as the next digit of our solution. 
Result so far: 83058.9
Deduct 5805 from 6390 and we're left with 585.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5850, and continue the process.

Moving on to step 10:
If we divide 5850 by 645, we get 9 and a remainder of 45.
Put 9 as the next digit of the answer. 
Result so far: 83058.99
Subtracting 5805 from 5850 leaves us with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

After the division, we end up with 83058.99 and a remainder of 0.045.