Let's divide 51373079 by 80
We want to figure out the number of times 51373079 can be divided by 80.

Moving on to step 1:
If we divide 5 by 80, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 80

Going ahead to step 2:
80 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Take the next digit (3) from the dividend and append it to 51, then repeat: 513 / 80

On to step 3:
80 goes into 513 6 times with a remainder of 33.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtract 480 from 513 to get 33.
Grab the next digit (7) from the dividend, add it to 33, then carry on: 337 / 80

On to step 4:
When dividing 337 by 80, we get 4 with a remainder of 17.
Write down 4 as next digit of the result. 
Result so far: 64.0
If we subtract 320 from 337, we get 17.
Include the next digit (3) from the dividend after 17, then repeat: 173 / 80

On to step 5:
If we divide 173 by 80, we get 2 and a remainder of 13.
The next digit of our result is 2. 
Result so far: 642.0
If we subtract 160 from 173, we get 13.
Include the next digit (0) from the dividend after 13, then repeat: 130 / 80

Let's proceed to step 6:
If we divide 130 by 80, we get 1 and a remainder of 50.
Write down 1 as next digit of the result. 
Result so far: 6421.0
If we subtract 80 from 130, we get 50.
Fetch the next digit (7) from the dividend, attach it to 50 and continue: 507 / 80

Step 7:
When dividing 507 by 80, we get 6 with a remainder of 27.
The number 6 becomes the next digit in our result. 
Result so far: 64216.0
Subtracting 480 from 507 leaves us with 27.
Append the next digit (9) from the dividend to 27 and continue with: 279 / 80

On to step 8:
80 goes into 279 3 times with a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 642163.0
If we subtract 240 from 279, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Moving on to step 9:
The number 80 fits into 390 4 times, leaving a remainder of 70.
The number 4 becomes the next digit in our result. 
Result so far: 642163.4
Subtracting 320 from 390 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 10:
When dividing 700 by 80, we get 8 with a remainder of 60.
Use 8 as the next digit of our solution. 
Result so far: 642163.48
The remainder is 60 after subtracting 640 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 11:
When dividing 600 by 80, we get 7 with a remainder of 40.
The next digit of our result is 7. 
Result so far: 642163.487
If we subtract 560 from 600, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 12:
80 goes into 400 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 642163.4875
Subtracting 400 from 400 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.

Going ahead to step 13:
When dividing 0 by 80, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 642163.4875
Subtract 0 from 0 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 14:
If we divide 0 by 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 642163.4875
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.

Our division results in 642163.4875 with a remaining 0.0.