771799 ÷ 20 
Our goal is to divide 771799 by 20.

Going ahead to step 1:
7 divided by 20 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 20

Step 2:
The number 20 fits into 77 3 times, leaving a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 60 away from 77, we end up with 17.
Append the next digit (1) from the dividend to 17 and continue with: 171 / 20

Advancing to step 3:
The number 20 fits into 171 8 times, leaving a remainder of 11.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
The remainder is 11 after subtracting 160 from 171.
Bring next digit (7) of the dividend behind the 11 and repeat the process: 117 / 20

On to step 4:
If we divide 117 by 20, we get 5 and a remainder of 17.
Write down 5 as next digit of the result. 
Result so far: 385.0
Subtracting 100 from 117 leaves us with 17.
Append the next digit (9) from the dividend to 17 and continue with: 179 / 20

Step 5:
20 can be fit into 179 8 times, resulting in a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 3858.0
Subtract 160 from 179 to get 19.
Take the next digit (9) from the dividend and append it to 19, then repeat: 199 / 20

On to step 6:
If we divide 199 by 20, we get 9 and a remainder of 19.
Record the quotient 9 as the next digit in the result. 
Result so far: 38589.0
If we subtract 180 from 199, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 7:
If we divide 190 by 20, we get 9 and a remainder of 10.
The next digit of our result is 9. 
Result so far: 38589.9
Subtract 180 from 190 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 38589.95
Deduct 100 from 100 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 38589.95
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
When dividing 0 by 20, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 38589.95
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 38589.95, with a leftover of 0.0.