18777891 divided by 20 
Our goal is to divide 18777891 by 20.

Advancing to step 1:
When dividing 1 by 20, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (8) from the dividend after 1, then repeat: 18 / 20

Moving on to step 2:
If we divide 18 by 20, we get 0 and a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Take the next digit (7) from the dividend and append it to 18, then repeat: 187 / 20

On to step 3:
The number 20 fits into 187 9 times, leaving a remainder of 7.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtract 180 from 187 to get 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 20

Advancing to step 4:
If we divide 77 by 20, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 93.0
Subtracting 60 from 77 leaves us with 17.
Bring next digit (7) of the dividend behind the 17 and repeat the process: 177 / 20

Let's proceed to step 5:
The number 20 fits into 177 8 times, leaving a remainder of 17.
Put 8 as the next digit of the answer. 
Result so far: 938.0
Subtracting 160 from 177 leaves us with 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 20

Moving on to step 6:
178 divided by 20 is 8 with a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 9388.0
If we subtract 160 from 178, we get 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 20

Going ahead to step 7:
20 goes into 189 9 times with a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 93889.0
Deduct 180 from 189 and we're left with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 20

Step 8:
20 goes into 91 4 times with a remainder of 11.
Put 4 as the next digit of the answer. 
Result so far: 938894.0
If we subtract 80 from 91, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 9:
The number 20 fits into 110 5 times, leaving a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 938894.5
If we take 100 away from 110, we end up with 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 10:
The number 20 fits into 100 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 938894.55
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.

In conclusion, the division gives 938894.55 with a balance of 0.0.