52592481 ÷ 645 
We're looking to find how many times 645 goes into 52592481.

Step 1:
If we divide 5 by 645, we get 0 and 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 (2) from the dividend, attach it to 5 and continue: 52 / 645

On to step 2:
645 goes into 52 0 times with a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 52 to get 52.
Bring next digit (5) of the dividend behind the 52 and repeat the process: 525 / 645

On to step 3:
If we divide 525 by 645, we get 0 and a remainder of 525.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 525 and we're left with 525.
Grab the next digit (9) from the dividend, add it to 525, then carry on: 5259 / 645

Advancing to step 4:
The number 645 fits into 5259 8 times, leaving a remainder of 99.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 5160 from 5259 and we're left with 99.
Take the next digit (2) from the dividend and append it to 99, then repeat: 992 / 645

Advancing to step 5:
645 can be fit into 992 1 times, resulting in a remainder of 347.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
Deduct 645 from 992 and we're left with 347.
Grab the next digit (4) from the dividend, add it to 347, then carry on: 3474 / 645

Going ahead to step 6:
If we divide 3474 by 645, we get 5 and a remainder of 249.
Use 5 as the next digit of our solution. 
Result so far: 815.0
The remainder is 249 after subtracting 3225 from 3474.
Append the next digit (8) from the dividend to 249 and continue with: 2498 / 645

Let's proceed to step 7:
2498 divided by 645 is 3 with a remainder of 563.
Use 3 as the next digit of our solution. 
Result so far: 8153.0
The remainder is 563 after subtracting 1935 from 2498.
Take the next digit (1) from the dividend and append it to 563, then repeat: 5631 / 645

Moving on to step 8:
645 goes into 5631 8 times with a remainder of 471.
The next digit of our result is 8. 
Result so far: 81538.0
If we subtract 5160 from 5631, we get 471.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4710, and continue the process.

On to step 9:
645 can be fit into 4710 7 times, resulting in a remainder of 195.
Use 7 as the next digit of our solution. 
Result so far: 81538.7
Deduct 4515 from 4710 and we're left 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 10:
The number 645 fits into 1950 3 times, leaving a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 81538.73
If we take 1935 away from 1950, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 11:
If we divide 150 by 645, we get 0 and a remainder of 150.
Put 0 as the next digit of the answer. 
Result so far: 81538.73
If we subtract 0 from 150, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 12:
When dividing 1500 by 645, we get 2 with a remainder of 210.
The next digit of our result is 2. 
Result so far: 81538.7302
If we take 1290 away from 1500, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 13:
When dividing 2100 by 645, we get 3 with a remainder of 165.
Use 3 as the next digit of our solution. 
Result so far: 81538.73023
Subtracting 1935 from 2100 leaves us 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.

Advancing to step 14:
645 goes into 1650 2 times with a remainder of 360.
Use 2 as the next digit of our solution. 
Result so far: 81538.730232
Subtracting 1290 from 1650 leaves us with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Going ahead to step 15:
645 can be fit into 3600 5 times, resulting in a remainder of 375.
The next digit of our result is 5. 
Result so far: 81538.7302325
If we take 3225 away from 3600, we end up 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.

Step 16:
645 goes into 3750 5 times with a remainder of 525.
Write down 5 as next digit of the result. 
Result so far: 81538.73023255
Subtracting 3225 from 3750 leaves us with 525.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5250, and continue the process.

The final result is 81538.73023255 with a remainder of 5.25e-07.