We look at the division of 80561698 by 810 
Let's see how many times 810 fits into 80561698.

On to step 1:
When dividing 8 by 810, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 810

Advancing to step 2:
80 divided by 810 is 0 with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Append the next digit (5) from the dividend to 80 and continue with: 805 / 810

Going ahead to step 3:
805 divided by 810 is 0 with a remainder of 805.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 805 to get 805.
Include the next digit (6) from the dividend after 805, then repeat: 8056 / 810

Let's proceed to step 4:
When dividing 8056 by 810, we get 9 with a remainder of 766.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 7290 from 8056 and we're left with 766.
Take the next digit (1) from the dividend and append it to 766, then repeat: 7661 / 810

Let's proceed to step 5:
If we divide 7661 by 810, we get 9 and a remainder of 371.
Use 9 as the next digit of our solution. 
Result so far: 99.0
The remainder is 371 after subtracting 7290 from 7661.
Include the next digit (6) from the dividend after 371, then repeat: 3716 / 810

Moving on to step 6:
810 can be fit into 3716 4 times, resulting in a remainder of 476.
Write down 4 as next digit of the result. 
Result so far: 994.0
Deduct 3240 from 3716 and we're left with 476.
Grab the next digit (9) from the dividend, add it to 476, then carry on: 4769 / 810

Let's proceed to step 7:
If we divide 4769 by 810, we get 5 and a remainder of 719.
Use 5 as the next digit of our solution. 
Result so far: 9945.0
Deduct 4050 from 4769 and we're left with 719.
Take the next digit (8) from the dividend and append it to 719, then repeat: 7198 / 810

On to step 8:
If we divide 7198 by 810, we get 8 and a remainder of 718.
Use 8 as the next digit of our solution. 
Result so far: 99458.0
Deduct 6480 from 7198 and we're left with 718.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7180, and continue the process.

Going ahead to step 9:
The number 810 fits into 7180 8 times, leaving a remainder of 700.
The next digit of our result is 8. 
Result so far: 99458.8
Subtracting 6480 from 7180 leaves us with 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

On to step 10:
810 can be fit into 7000 8 times, resulting in a remainder of 520.
Record the quotient 8 as the next digit in the result. 
Result so far: 99458.88
Deduct 6480 from 7000 and we're left with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

The final result is 99458.88 with a remainder of 0.52.