81029993 divided by 261 
We're looking to find how many times 261 goes into 81029993.

Advancing to step 1:
8 divided by 261 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 261

Step 2:
81 divided by 261 is 0 with a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Append the next digit (0) from the dividend to 81 and continue with: 810 / 261

Step 3:
If we divide 810 by 261, we get 3 and a remainder of 27.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 783 from 810 leaves us with 27.
Bring next digit (2) of the dividend behind the 27 and repeat the process: 272 / 261

Moving on to step 4:
261 goes into 272 1 times with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 31.0
The remainder is 11 after subtracting 261 from 272.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 261

Moving on to step 5:
261 goes into 119 0 times with a remainder of 119.
The next digit of our result is 0. 
Result so far: 310.0
If we take 0 away from 119, we end up with 119.
Include the next digit (9) from the dividend after 119, then repeat: 1199 / 261

Step 6:
If we divide 1199 by 261, we get 4 and a remainder of 155.
The number 4 becomes the next digit in our result. 
Result so far: 3104.0
If we subtract 1044 from 1199, we get 155.
Bring next digit (9) of the dividend behind the 155 and repeat the process: 1559 / 261

Moving on to step 7:
If we divide 1559 by 261, we get 5 and a remainder of 254.
Record the quotient 5 as the next digit in the result. 
Result so far: 31045.0
If we subtract 1305 from 1559, we get 254.
Append the next digit (3) from the dividend to 254 and continue with: 2543 / 261

On to step 8:
261 can be fit into 2543 9 times, resulting in a remainder of 194.
The next digit of our result is 9. 
Result so far: 310459.0
Deduct 2349 from 2543 and we're left with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Step 9:
The number 261 fits into 1940 7 times, leaving a remainder of 113.
Put 7 as the next digit of the answer. 
Result so far: 310459.7
Subtracting 1827 from 1940 leaves us with 113.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

On to step 10:
The number 261 fits into 1130 4 times, leaving a remainder of 86.
The next digit of our result is 4. 
Result so far: 310459.74
If we subtract 1044 from 1130, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

On to step 11:
261 can be fit into 860 3 times, resulting in a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 310459.743
The remainder is 77 after subtracting 783 from 860.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 12:
The number 261 fits into 770 2 times, leaving a remainder of 248.
Put 2 as the next digit of the answer. 
Result so far: 310459.7432
Subtracting 522 from 770 leaves us with 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Advancing to step 13:
261 can be fit into 2480 9 times, resulting in a remainder of 131.
The number 9 becomes the next digit in our result. 
Result so far: 310459.74329
Deduct 2349 from 2480 and we're left with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Advancing to step 14:
When dividing 1310 by 261, we get 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 310459.743295
Subtracting 1305 from 1310 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 15:
261 goes into 50 0 times with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 310459.743295
If we subtract 0 from 50, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 16:
261 can be fit into 500 1 times, resulting in a remainder of 239.
Put 1 as the next digit of the answer. 
Result so far: 310459.74329501
Subtract 261 from 500 to get 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

In conclusion, the division gives 310459.74329501 with a balance of 2.39e-07.