We look at the division of 77812503 by 20 
We're looking to find how many times 20 goes into 77812503.

Let's proceed to step 1:
20 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 20

Advancing to step 2:
The number 20 fits into 77 3 times, leaving a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 60 from 77 leaves us with 17.
Fetch the next digit (8) from the dividend, attach it to 17 and continue: 178 / 20

Going ahead to step 3:
If we divide 178 by 20, we get 8 and a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
The remainder is 18 after subtracting 160 from 178.
Take the next digit (1) from the dividend and append it to 18, then repeat: 181 / 20

On to step 4:
181 divided by 20 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 389.0
If we take 180 away from 181, we end up with 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 20

Step 5:
When dividing 12 by 20, we get 0 with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 3890.0
If we take 0 away from 12, we end up with 12.
Take the next digit (5) from the dividend and append it to 12, then repeat: 125 / 20

Step 6:
When dividing 125 by 20, we get 6 with a remainder of 5.
The next digit of our result is 6. 
Result so far: 38906.0
Subtract 120 from 125 to get 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 20

Let's proceed to step 7:
If we divide 50 by 20, we get 2 and a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 389062.0
If we subtract 40 from 50, we get 10.
Fetch the next digit (3) from the dividend, attach it to 10 and continue: 103 / 20

Going ahead to step 8:
20 can be fit into 103 5 times, resulting in a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 3890625.0
The remainder is 3 after subtracting 100 from 103.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 9:
20 can be fit into 30 1 times, resulting in a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 3890625.1
Deduct 20 from 30 and we're left 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:
100 divided by 20 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 3890625.15
If we take 100 away from 100, we end up 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.

Advancing to step 11:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 3890625.15
If we take 0 away from 0, we end up 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.

Let's proceed to step 12:
0 divided by 20 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3890625.15
Subtracting 0 from 0 leaves us 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.

Our division results in 3890625.15 with a remaining 0.0.