Let's divide 51349159 by 20
We're looking to find how many times 20 goes into 51349159.

Step 1:
When dividing 5 by 20, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 20

Going ahead to step 2:
51 divided by 20 is 2 with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 40 from 51 and we're left with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 20

Step 3:
20 goes into 113 5 times with a remainder of 13.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
If we take 100 away from 113, we end up with 13.
Append the next digit (4) from the dividend to 13 and continue with: 134 / 20

On to step 4:
When dividing 134 by 20, we get 6 with a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 256.0
Subtract 120 from 134 to get 14.
Fetch the next digit (9) from the dividend, attach it to 14 and continue: 149 / 20

Step 5:
The number 20 fits into 149 7 times, leaving a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 2567.0
Subtracting 140 from 149 leaves us with 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 20

Step 6:
The number 20 fits into 91 4 times, leaving a remainder of 11.
The next digit of our result is 4. 
Result so far: 25674.0
The remainder is 11 after subtracting 80 from 91.
Take the next digit (5) from the dividend and append it to 11, then repeat: 115 / 20

Moving on to step 7:
20 can be fit into 115 5 times, resulting in a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 256745.0
Deduct 100 from 115 and we're left with 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 20

Let's proceed to step 8:
20 goes into 159 7 times with a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 2567457.0
Subtract 140 from 159 to 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.

On to step 9:
The number 20 fits into 190 9 times, leaving a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 2567457.9
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.

Going ahead 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: 2567457.95
The remainder is 0 after subtracting 100 from 100.
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 11:
0 divided by 20 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 2567457.95
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.

Step 12:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 2567457.95
Deduct 0 from 0 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.

After the division, we end up with 2567457.95 and a remainder of 0.0.