66784809 divided by 800 
Our goal is to divide 66784809 by 800.

Advancing to step 1:
800 goes into 6 0 times with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 800

Let's proceed to step 2:
800 can be fit into 66 0 times, resulting in a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Append the next digit (7) from the dividend to 66 and continue with: 667 / 800

Advancing to step 3:
The number 800 fits into 667 0 times, leaving a remainder of 667.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 667 and we're left with 667.
Take the next digit (8) from the dividend and append it to 667, then repeat: 6678 / 800

On to step 4:
If we divide 6678 by 800, we get 8 and a remainder of 278.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 6400 from 6678 to get 278.
Bring next digit (4) of the dividend behind the 278 and repeat the process: 2784 / 800

Let's proceed to step 5:
800 goes into 2784 3 times with a remainder of 384.
Use 3 as the next digit of our solution. 
Result so far: 83.0
If we subtract 2400 from 2784, we get 384.
Bring next digit (8) of the dividend behind the 384 and repeat the process: 3848 / 800

Going ahead to step 6:
800 can be fit into 3848 4 times, resulting in a remainder of 648.
Put 4 as the next digit of the answer. 
Result so far: 834.0
Subtract 3200 from 3848 to get 648.
Grab the next digit (0) from the dividend, add it to 648, then carry on: 6480 / 800

On to step 7:
When dividing 6480 by 800, we get 8 with a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 8348.0
The remainder is 80 after subtracting 6400 from 6480.
Grab the next digit (9) from the dividend, add it to 80, then carry on: 809 / 800

On to step 8:
800 goes into 809 1 times with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 83481.0
The remainder is 9 after subtracting 800 from 809.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
When dividing 90 by 800, we get 0 with a remainder of 90.
The next digit of our result is 0. 
Result so far: 83481.0
Deduct 0 from 90 and we're left with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Let's proceed to step 10:
When dividing 900 by 800, we get 1 with a remainder of 100.
The number 1 becomes the next digit in our result. 
Result so far: 83481.01
Deduct 800 from 900 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 11:
800 can be fit into 1000 1 times, resulting in a remainder of 200.
Use 1 as the next digit of our solution. 
Result so far: 83481.011
Subtracting 800 from 1000 leaves us with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 83481.011, with a leftover of 0.02.