We look at the division of 81315166 by 989 
We want to figure out the number of times 81315166 can be divided by 989.

Step 1:
If we divide 8 by 989, we get 0 and a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 989

On to step 2:
The number 989 fits into 81 0 times, leaving a remainder of 81.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Bring next digit (3) of the dividend behind the 81 and repeat the process: 813 / 989

Step 3:
813 divided by 989 is 0 with a remainder of 813.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 813, we end up with 813.
Bring next digit (1) of the dividend behind the 813 and repeat the process: 8131 / 989

Going ahead to step 4:
989 goes into 8131 8 times with a remainder of 219.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 7912 from 8131 to get 219.
Take the next digit (5) from the dividend and append it to 219, then repeat: 2195 / 989

Moving on to step 5:
The number 989 fits into 2195 2 times, leaving a remainder of 217.
The number 2 becomes the next digit in our result. 
Result so far: 82.0
Subtract 1978 from 2195 to get 217.
Take the next digit (1) from the dividend and append it to 217, then repeat: 2171 / 989

Step 6:
The number 989 fits into 2171 2 times, leaving a remainder of 193.
Use 2 as the next digit of our solution. 
Result so far: 822.0
If we subtract 1978 from 2171, we get 193.
Append the next digit (6) from the dividend to 193 and continue with: 1936 / 989

Step 7:
1936 divided by 989 is 1 with a remainder of 947.
Write down 1 as next digit of the result. 
Result so far: 8221.0
Subtracting 989 from 1936 leaves us with 947.
Take the next digit (6) from the dividend and append it to 947, then repeat: 9476 / 989

Step 8:
When dividing 9476 by 989, we get 9 with a remainder of 575.
Put 9 as the next digit of the answer. 
Result so far: 82219.0
If we subtract 8901 from 9476, we get 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Advancing to step 9:
If we divide 5750 by 989, we get 5 and a remainder of 805.
Record the quotient 5 as the next digit in the result. 
Result so far: 82219.5
If we subtract 4945 from 5750, we get 805.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8050, and continue the process.

Going ahead to step 10:
The number 989 fits into 8050 8 times, leaving a remainder of 138.
Put 8 as the next digit of the answer. 
Result so far: 82219.58
Subtract 7912 from 8050 to get 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Let's proceed to step 11:
If we divide 1380 by 989, we get 1 and a remainder of 391.
Use 1 as the next digit of our solution. 
Result so far: 82219.581
The remainder is 391 after subtracting 989 from 1380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3910, and continue the process.

Let's proceed to step 12:
989 can be fit into 3910 3 times, resulting in a remainder of 943.
The next digit of our result is 3. 
Result so far: 82219.5813
The remainder is 943 after subtracting 2967 from 3910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9430, and continue the process.

Advancing to step 13:
When dividing 9430 by 989, we get 9 with a remainder of 529.
The next digit of our result is 9. 
Result so far: 82219.58139
If we subtract 8901 from 9430, we get 529.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5290, and continue the process.

Moving on to step 14:
The number 989 fits into 5290 5 times, leaving a remainder of 345.
Put 5 as the next digit of the answer. 
Result so far: 82219.581395
Subtracting 4945 from 5290 leaves us 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.

Step 15:
If we divide 3450 by 989, we get 3 and a remainder of 483.
Record the quotient 3 as the next digit in the result. 
Result so far: 82219.5813953
Deduct 2967 from 3450 and we're left with 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Going ahead to step 16:
989 can be fit into 4830 4 times, resulting in a remainder of 874.
The next digit of our result is 4. 
Result so far: 82219.58139534
If we subtract 3956 from 4830, we get 874.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8740, and continue the process.

In conclusion, the division gives 82219.58139534 with a balance of 8.74e-07.