81979911 ÷ 485 
We want to divide 81979911 by 485.

Step 1:
The number 485 fits into 8 0 times, leaving a remainder of 8.
The number 0 becomes the next digit in our 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 / 485

Going ahead to step 2:
81 divided by 485 is 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Include the next digit (9) from the dividend after 81, then repeat: 819 / 485

Moving on to step 3:
The number 485 fits into 819 1 times, leaving a remainder of 334.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 485 away from 819, we end up with 334.
Bring next digit (7) of the dividend behind the 334 and repeat the process: 3347 / 485

Advancing to step 4:
485 goes into 3347 6 times with a remainder of 437.
Write down 6 as next digit of the result. 
Result so far: 16.0
Subtracting 2910 from 3347 leaves us with 437.
Include the next digit (9) from the dividend after 437, then repeat: 4379 / 485

Moving on to step 5:
4379 divided by 485 is 9 with a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 169.0
Deduct 4365 from 4379 and we're left with 14.
Take the next digit (9) from the dividend and append it to 14, then repeat: 149 / 485

Moving on to step 6:
When dividing 149 by 485, we get 0 with a remainder of 149.
Record the quotient 0 as the next digit in the result. 
Result so far: 1690.0
Subtract 0 from 149 to get 149.
Include the next digit (1) from the dividend after 149, then repeat: 1491 / 485

On to step 7:
485 can be fit into 1491 3 times, resulting in a remainder of 36.
The number 3 becomes the next digit in our result. 
Result so far: 16903.0
Subtract 1455 from 1491 to get 36.
Grab the next digit (1) from the dividend, add it to 36, then carry on: 361 / 485

On to step 8:
The number 485 fits into 361 0 times, leaving a remainder of 361.
Write down 0 as next digit of the result. 
Result so far: 169030.0
Subtract 0 from 361 to get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Moving on to step 9:
When dividing 3610 by 485, we get 7 with a remainder of 215.
Record the quotient 7 as the next digit in the result. 
Result so far: 169030.7
If we subtract 3395 from 3610, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Step 10:
When dividing 2150 by 485, we get 4 with a remainder of 210.
Record the quotient 4 as the next digit in the result. 
Result so far: 169030.74
If we subtract 1940 from 2150, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Advancing to step 11:
The number 485 fits into 2100 4 times, leaving a remainder of 160.
Write down 4 as next digit of the result. 
Result so far: 169030.744
Subtracting 1940 from 2100 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

The quotient of the division is 169030.744, and the remainder is 0.016.