We divide 25430 by 80
Let's see how many times 80 fits into 25430.

On to step 1:
When dividing 2 by 80, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (5) from the dividend after 2, then repeat: 25 / 80

Advancing to step 2:
25 divided by 80 is 0 with a remainder of 25.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 25 after subtracting 0 from 25.
Include the next digit (4) from the dividend after 25, then repeat: 254 / 80

Moving on to step 3:
80 can be fit into 254 3 times, resulting in a remainder of 14.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 14 after subtracting 240 from 254.
Bring next digit (3) of the dividend behind the 14 and repeat the process: 143 / 80

Step 4:
80 can be fit into 143 1 times, resulting in a remainder of 63.
Put 1 as the next digit of the answer. 
Result so far: 31.0
If we subtract 80 from 143, we get 63.
Bring next digit (0) of the dividend behind the 63 and repeat the process: 630 / 80

Let's proceed to step 5:
80 goes into 630 7 times with a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 317.0
Subtracting 560 from 630 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.

Advancing to step 6:
80 goes into 700 8 times with a remainder of 60.
Use 8 as the next digit of our solution. 
Result so far: 317.8
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.

Step 7:
If we divide 600 by 80, we get 7 and a remainder of 40.
Write down 7 as next digit of the result. 
Result so far: 317.87
Subtract 560 from 600 to 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 8:
80 can be fit into 400 5 times, resulting in a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 317.875
Subtract 400 from 400 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.

On to step 9:
The number 80 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 317.875
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.

Advancing to step 10:
If we divide 0 by 80, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 317.875
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 317.875 with a remaining 0.0.