Let's divide 122451 by 80
We want to figure out the number of times 122451 can be divided by 80.

Advancing to step 1:
1 divided by 80 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 80

Moving on to step 2:
When dividing 12 by 80, we get 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Fetch the next digit (2) from the dividend, attach it to 12 and continue: 122 / 80

Going ahead to step 3:
80 goes into 122 1 times with a remainder of 42.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 42 after subtracting 80 from 122.
Bring next digit (4) of the dividend behind the 42 and repeat the process: 424 / 80

Step 4:
424 divided by 80 is 5 with a remainder of 24.
Write down 5 as next digit of the result. 
Result so far: 15.0
If we subtract 400 from 424, we get 24.
Fetch the next digit (5) from the dividend, attach it to 24 and continue: 245 / 80

Moving on to step 5:
80 can be fit into 245 3 times, resulting in a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 153.0
The remainder is 5 after subtracting 240 from 245.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 80

Going ahead to step 6:
51 divided by 80 is 0 with a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 1530.0
Subtracting 0 from 51 leaves us with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 7:
The number 80 fits into 510 6 times, leaving a remainder of 30.
Put 6 as the next digit of the answer. 
Result so far: 1530.6
Subtract 480 from 510 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 8:
The number 80 fits into 300 3 times, leaving a remainder of 60.
The next digit of our result is 3. 
Result so far: 1530.63
If we subtract 240 from 300, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
600 divided by 80 is 7 with a remainder of 40.
Use 7 as the next digit of our solution. 
Result so far: 1530.637
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.

Step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1530.6375
The remainder is 0 after subtracting 400 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 11:
80 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: 1530.6375
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.

Advancing to step 12:
0 divided by 80 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1530.6375
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.

The final outcome is 1530.6375, with a leftover of 0.0.