72821990 ÷ 511 
We want to figure out the number of times 72821990 can be divided by 511.

Going ahead to step 1:
511 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 511

Moving on to step 2:
511 can be fit into 72 0 times, resulting in a remainder of 72.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 72 to get 72.
Take the next digit (8) from the dividend and append it to 72, then repeat: 728 / 511

Let's proceed to step 3:
728 divided by 511 is 1 with a remainder of 217.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 217 after subtracting 511 from 728.
Bring next digit (2) of the dividend behind the 217 and repeat the process: 2172 / 511

On to step 4:
If we divide 2172 by 511, we get 4 and a remainder of 128.
The next digit of our result is 4. 
Result so far: 14.0
Subtract 2044 from 2172 to get 128.
Append the next digit (1) from the dividend to 128 and continue with: 1281 / 511

Let's proceed to step 5:
The number 511 fits into 1281 2 times, leaving a remainder of 259.
Record the quotient 2 as the next digit in the result. 
Result so far: 142.0
Deduct 1022 from 1281 and we're left with 259.
Fetch the next digit (9) from the dividend, attach it to 259 and continue: 2599 / 511

On to step 6:
511 can be fit into 2599 5 times, resulting in a remainder of 44.
Write down 5 as next digit of the result. 
Result so far: 1425.0
Subtract 2555 from 2599 to get 44.
Include the next digit (9) from the dividend after 44, then repeat: 449 / 511

On to step 7:
If we divide 449 by 511, we get 0 and a remainder of 449.
Use 0 as the next digit of our solution. 
Result so far: 14250.0
Subtracting 0 from 449 leaves us with 449.
Take the next digit (0) from the dividend and append it to 449, then repeat: 4490 / 511

On to step 8:
The number 511 fits into 4490 8 times, leaving a remainder of 402.
Use 8 as the next digit of our solution. 
Result so far: 142508.0
Deduct 4088 from 4490 and we're left with 402.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Let's proceed to step 9:
When dividing 4020 by 511, we get 7 with a remainder of 443.
The next digit of our result is 7. 
Result so far: 142508.7
Subtracting 3577 from 4020 leaves us with 443.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4430, and continue the process.

On to step 10:
4430 divided by 511 is 8 with a remainder of 342.
Use 8 as the next digit of our solution. 
Result so far: 142508.78
Subtracting 4088 from 4430 leaves us with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Going ahead to step 11:
511 can be fit into 3420 6 times, resulting in a remainder of 354.
Put 6 as the next digit of the answer. 
Result so far: 142508.786
If we subtract 3066 from 3420, we get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Step 12:
The number 511 fits into 3540 6 times, leaving a remainder of 474.
The number 6 becomes the next digit in our result. 
Result so far: 142508.7866
If we take 3066 away from 3540, we end up with 474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4740, and continue the process.

Our division results in 142508.7866 with a remaining 0.00474.