Let's divide 77513644 by 20
We want to divide 77513644 by 20.

Moving on to step 1:
20 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 20

Going ahead to step 2:
20 goes into 77 3 times with a remainder of 17.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 60 from 77, we get 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 20

Advancing to step 3:
The number 20 fits into 175 8 times, leaving a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 38.0
The remainder is 15 after subtracting 160 from 175.
Append the next digit (1) from the dividend to 15 and continue with: 151 / 20

On to step 4:
The number 20 fits into 151 7 times, leaving a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 387.0
Subtracting 140 from 151 leaves us with 11.
Grab the next digit (3) from the dividend, add it to 11, then carry on: 113 / 20

Going ahead to step 5:
20 goes into 113 5 times with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 3875.0
Deduct 100 from 113 and we're left with 13.
Bring next digit (6) of the dividend behind the 13 and repeat the process: 136 / 20

Step 6:
The number 20 fits into 136 6 times, leaving a remainder of 16.
The next digit of our result is 6. 
Result so far: 38756.0
If we subtract 120 from 136, we get 16.
Include the next digit (4) from the dividend after 16, then repeat: 164 / 20

On to step 7:
20 goes into 164 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 387568.0
If we take 160 away from 164, we end up with 4.
Take the next digit (4) from the dividend and append it to 4, then repeat: 44 / 20

Going ahead to step 8:
20 goes into 44 2 times with a remainder of 4.
Record the quotient 2 as the next digit in the result. 
Result so far: 3875682.0
If we take 40 away from 44, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
20 can be fit into 40 2 times, resulting in a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 3875682.2
Subtract 40 from 40 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 3875682.2
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.

Step 11:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 3875682.2
If we subtract 0 from 0, we get 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 3875682.2 with a remaining 0.0.