81918685 ÷ 990 
We want to figure out the number of times 81918685 can be divided by 990.

Advancing to step 1:
990 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 990

Advancing to step 2:
If we divide 81 by 990, we get 0 and a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Bring next digit (9) of the dividend behind the 81 and repeat the process: 819 / 990

Let's proceed to step 3:
If we divide 819 by 990, we get 0 and a remainder of 819.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 819 after subtracting 0 from 819.
Take the next digit (1) from the dividend and append it to 819, then repeat: 8191 / 990

Going ahead to step 4:
990 can be fit into 8191 8 times, resulting in a remainder of 271.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 7920 from 8191 leaves us with 271.
Include the next digit (8) from the dividend after 271, then repeat: 2718 / 990

Let's proceed to step 5:
2718 divided by 990 is 2 with a remainder of 738.
Record the quotient 2 as the next digit in the result. 
Result so far: 82.0
Deduct 1980 from 2718 and we're left with 738.
Bring next digit (6) of the dividend behind the 738 and repeat the process: 7386 / 990

On to step 6:
If we divide 7386 by 990, we get 7 and a remainder of 456.
Record the quotient 7 as the next digit in the result. 
Result so far: 827.0
If we take 6930 away from 7386, we end up with 456.
Fetch the next digit (8) from the dividend, attach it to 456 and continue: 4568 / 990

Moving on to step 7:
990 goes into 4568 4 times with a remainder of 608.
Use 4 as the next digit of our solution. 
Result so far: 8274.0
If we subtract 3960 from 4568, we get 608.
Bring next digit (5) of the dividend behind the 608 and repeat the process: 6085 / 990

Advancing to step 8:
The number 990 fits into 6085 6 times, leaving a remainder of 145.
Use 6 as the next digit of our solution. 
Result so far: 82746.0
Deduct 5940 from 6085 and we're left with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 9:
990 goes into 1450 1 times with a remainder of 460.
The number 1 becomes the next digit in our result. 
Result so far: 82746.1
The remainder is 460 after subtracting 990 from 1450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Going ahead to step 10:
When dividing 4600 by 990, we get 4 with a remainder of 640.
Write down 4 as next digit of the result. 
Result so far: 82746.14
Subtracting 3960 from 4600 leaves us with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 11:
6400 divided by 990 is 6 with a remainder of 460.
The next digit of our result is 6. 
Result so far: 82746.146
Deduct 5940 from 6400 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

Advancing to step 12:
The number 990 fits into 4600 4 times, leaving a remainder of 640.
The next digit of our result is 4. 
Result so far: 82746.1464
If we take 3960 away from 4600, we end up with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Going ahead to step 13:
6400 divided by 990 is 6 with a remainder of 460.
Write down 6 as next digit of the result. 
Result so far: 82746.14646
Deduct 5940 from 6400 and we're left with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

On to step 14:
990 can be fit into 4600 4 times, resulting in a remainder of 640.
Put 4 as the next digit of the answer. 
Result so far: 82746.146464
If we take 3960 away from 4600, we end up with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Moving on to step 15:
6400 divided by 990 is 6 with a remainder of 460.
Write down 6 as next digit of the result. 
Result so far: 82746.1464646
Subtracting 5940 from 6400 leaves us with 460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4600, and continue the process.

On to step 16:
990 can be fit into 4600 4 times, resulting in a remainder of 640.
Record the quotient 4 as the next digit in the result. 
Result so far: 82746.14646464
Deduct 3960 from 4600 and we're left with 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

The quotient of the division is 82746.14646464, and the remainder is 6.4e-07.