81873345 ÷ 990 
Our goal is to divide 81873345 by 990.

Step 1:
990 can be fit into 8 0 times, resulting in 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.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 990

Advancing to step 2:
990 can be fit into 81 0 times, resulting in a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 81 leaves us with 81.
Append the next digit (8) from the dividend to 81 and continue with: 818 / 990

Advancing to step 3:
990 goes into 818 0 times with a remainder of 818.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 818, we get 818.
Include the next digit (7) from the dividend after 818, then repeat: 8187 / 990

Advancing to step 4:
If we divide 8187 by 990, we get 8 and a remainder of 267.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 267 after subtracting 7920 from 8187.
Append the next digit (3) from the dividend to 267 and continue with: 2673 / 990

Going ahead to step 5:
The number 990 fits into 2673 2 times, leaving a remainder of 693.
Use 2 as the next digit of our solution. 
Result so far: 82.0
If we take 1980 away from 2673, we end up with 693.
Take the next digit (3) from the dividend and append it to 693, then repeat: 6933 / 990

Advancing to step 6:
The number 990 fits into 6933 7 times, leaving a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 827.0
Subtracting 6930 from 6933 leaves us with 3.
Bring next digit (4) of the dividend behind the 3 and repeat the process: 34 / 990

Step 7:
990 can be fit into 34 0 times, resulting in a remainder of 34.
Write down 0 as next digit of the result. 
Result so far: 8270.0
The remainder is 34 after subtracting 0 from 34.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 990

Going ahead to step 8:
990 goes into 345 0 times with a remainder of 345.
Record the quotient 0 as the next digit in the result. 
Result so far: 82700.0
Deduct 0 from 345 and we're left with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

On to step 9:
If we divide 3450 by 990, we get 3 and a remainder of 480.
Record the quotient 3 as the next digit in the result. 
Result so far: 82700.3
Deduct 2970 from 3450 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 10:
The number 990 fits into 4800 4 times, leaving a remainder of 840.
Put 4 as the next digit of the answer. 
Result so far: 82700.34
Deduct 3960 from 4800 and we're left with 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

On to step 11:
990 can be fit into 8400 8 times, resulting in a remainder of 480.
Use 8 as the next digit of our solution. 
Result so far: 82700.348
Deduct 7920 from 8400 and we're left with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Step 12:
990 can be fit into 4800 4 times, resulting in a remainder of 840.
Write down 4 as next digit of the result. 
Result so far: 82700.3484
Deduct 3960 from 4800 and we're left with 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Let's proceed to step 13:
The number 990 fits into 8400 8 times, leaving a remainder of 480.
The next digit of our result is 8. 
Result so far: 82700.34848
The remainder is 480 after subtracting 7920 from 8400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 14:
The number 990 fits into 4800 4 times, leaving a remainder of 840.
Use 4 as the next digit of our solution. 
Result so far: 82700.348484
Deduct 3960 from 4800 and we're left with 840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

Let's proceed to step 15:
990 goes into 8400 8 times with a remainder of 480.
Use 8 as the next digit of our solution. 
Result so far: 82700.3484848
Subtract 7920 from 8400 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 16:
When dividing 4800 by 990, we get 4 with a remainder of 840.
Put 4 as the next digit of the answer. 
Result so far: 82700.34848484
The remainder is 840 after subtracting 3960 from 4800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8400, and continue the process.

The final result is 82700.34848484 with a remainder of 8.4e-07.