20285591 ÷ 813 
We're looking to find how many times 813 goes into 20285591.

Let's proceed to step 1:
813 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 813

On to step 2:
20 divided by 813 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Include the next digit (2) from the dividend after 20, then repeat: 202 / 813

On to step 3:
202 divided by 813 is 0 with a remainder of 202.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 202 to get 202.
Bring next digit (8) of the dividend behind the 202 and repeat the process: 2028 / 813

Moving on to step 4:
If we divide 2028 by 813, we get 2 and a remainder of 402.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 1626 away from 2028, we end up with 402.
Bring next digit (5) of the dividend behind the 402 and repeat the process: 4025 / 813

Going ahead to step 5:
813 can be fit into 4025 4 times, resulting in a remainder of 773.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
If we subtract 3252 from 4025, we get 773.
Fetch the next digit (5) from the dividend, attach it to 773 and continue: 7735 / 813

Advancing to step 6:
813 goes into 7735 9 times with a remainder of 418.
Use 9 as the next digit of our solution. 
Result so far: 249.0
Subtract 7317 from 7735 to get 418.
Grab the next digit (9) from the dividend, add it to 418, then carry on: 4189 / 813

Step 7:
4189 divided by 813 is 5 with a remainder of 124.
Put 5 as the next digit of the answer. 
Result so far: 2495.0
If we subtract 4065 from 4189, we get 124.
Grab the next digit (1) from the dividend, add it to 124, then carry on: 1241 / 813

Step 8:
When dividing 1241 by 813, we get 1 with a remainder of 428.
Use 1 as the next digit of our solution. 
Result so far: 24951.0
If we take 813 away from 1241, we end up with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Advancing to step 9:
The number 813 fits into 4280 5 times, leaving a remainder of 215.
The next digit of our result is 5. 
Result so far: 24951.5
Subtracting 4065 from 4280 leaves us with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Let's proceed to step 10:
813 goes into 2150 2 times with a remainder of 524.
Write down 2 as next digit of the result. 
Result so far: 24951.52
If we subtract 1626 from 2150, we get 524.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5240, and continue the process.

Let's proceed to step 11:
If we divide 5240 by 813, we get 6 and a remainder of 362.
The next digit of our result is 6. 
Result so far: 24951.526
If we subtract 4878 from 5240, we get 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

On to step 12:
813 goes into 3620 4 times with a remainder of 368.
Write down 4 as next digit of the result. 
Result so far: 24951.5264
Subtract 3252 from 3620 to get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

On to step 13:
If we divide 3680 by 813, we get 4 and a remainder of 428.
Use 4 as the next digit of our solution. 
Result so far: 24951.52644
The remainder is 428 after subtracting 3252 from 3680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

The final result is 24951.52644 with a remainder of 0.000428.