Let's divide 81294513 by 999
We're looking to find how many times 999 goes into 81294513.

On to step 1:
If we divide 8 by 999, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 999

Going ahead to step 2:
The number 999 fits into 81 0 times, leaving a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Take the next digit (2) from the dividend and append it to 81, then repeat: 812 / 999

On to step 3:
When dividing 812 by 999, we get 0 with a remainder of 812.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 812 after subtracting 0 from 812.
Grab the next digit (9) from the dividend, add it to 812, then carry on: 8129 / 999

Step 4:
999 goes into 8129 8 times with a remainder of 137.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
The remainder is 137 after subtracting 7992 from 8129.
Append the next digit (4) from the dividend to 137 and continue with: 1374 / 999

On to step 5:
999 goes into 1374 1 times with a remainder of 375.
Use 1 as the next digit of our solution. 
Result so far: 81.0
If we take 999 away from 1374, we end up with 375.
Fetch the next digit (5) from the dividend, attach it to 375 and continue: 3755 / 999

Advancing to step 6:
3755 divided by 999 is 3 with a remainder of 758.
Use 3 as the next digit of our solution. 
Result so far: 813.0
Subtract 2997 from 3755 to get 758.
Bring next digit (1) of the dividend behind the 758 and repeat the process: 7581 / 999

Going ahead to step 7:
When dividing 7581 by 999, we get 7 with a remainder of 588.
Use 7 as the next digit of our solution. 
Result so far: 8137.0
The remainder is 588 after subtracting 6993 from 7581.
Fetch the next digit (3) from the dividend, attach it to 588 and continue: 5883 / 999

On to step 8:
999 can be fit into 5883 5 times, resulting in a remainder of 888.
The next digit of our result is 5. 
Result so far: 81375.0
Subtract 4995 from 5883 to get 888.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8880, and continue the process.

Step 9:
When dividing 8880 by 999, we get 8 with a remainder of 888.
The number 8 becomes the next digit in our result. 
Result so far: 81375.8
Subtracting 7992 from 8880 leaves us with 888.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8880, and continue the process.

Advancing to step 10:
The number 999 fits into 8880 8 times, leaving a remainder of 888.
Write down 8 as next digit of the result. 
Result so far: 81375.88
Subtract 7992 from 8880 to get 888.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8880, and continue the process.

The final outcome is 81375.88, with a leftover of 0.888.