80668561 ÷ 818 
We're looking to find how many times 818 goes into 80668561.

Step 1:
If we divide 8 by 818, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 818

Advancing to step 2:
The number 818 fits into 80 0 times, leaving a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Take the next digit (6) from the dividend and append it to 80, then repeat: 806 / 818

Step 3:
When dividing 806 by 818, we get 0 with a remainder of 806.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 806, we get 806.
Grab the next digit (6) from the dividend, add it to 806, then carry on: 8066 / 818

Going ahead to step 4:
818 can be fit into 8066 9 times, resulting in a remainder of 704.
The next digit of our result is 9. 
Result so far: 9.0
If we take 7362 away from 8066, we end up with 704.
Bring next digit (8) of the dividend behind the 704 and repeat the process: 7048 / 818

On to step 5:
When dividing 7048 by 818, we get 8 with a remainder of 504.
The number 8 becomes the next digit in our result. 
Result so far: 98.0
If we take 6544 away from 7048, we end up with 504.
Bring next digit (5) of the dividend behind the 504 and repeat the process: 5045 / 818

Advancing to step 6:
When dividing 5045 by 818, we get 6 with a remainder of 137.
Use 6 as the next digit of our solution. 
Result so far: 986.0
Deduct 4908 from 5045 and we're left with 137.
Fetch the next digit (6) from the dividend, attach it to 137 and continue: 1376 / 818

Moving on to step 7:
1376 divided by 818 is 1 with a remainder of 558.
Use 1 as the next digit of our solution. 
Result so far: 9861.0
Subtracting 818 from 1376 leaves us with 558.
Bring next digit (1) of the dividend behind the 558 and repeat the process: 5581 / 818

Going ahead to step 8:
If we divide 5581 by 818, we get 6 and a remainder of 673.
Write down 6 as next digit of the result. 
Result so far: 98616.0
If we take 4908 away from 5581, we end up with 673.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6730, and continue the process.

Going ahead to step 9:
818 goes into 6730 8 times with a remainder of 186.
Record the quotient 8 as the next digit in the result. 
Result so far: 98616.8
Subtracting 6544 from 6730 leaves us with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

On to step 10:
The number 818 fits into 1860 2 times, leaving a remainder of 224.
Record the quotient 2 as the next digit in the result. 
Result so far: 98616.82
If we take 1636 away from 1860, we end up with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Moving on to step 11:
818 can be fit into 2240 2 times, resulting in a remainder of 604.
Put 2 as the next digit of the answer. 
Result so far: 98616.822
Deduct 1636 from 2240 and we're left with 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Our division results in 98616.822 with a remaining 0.0604.