646079 ÷ 25 
We want to figure out the number of times 646079 can be divided by 25.

On to step 1:
The number 25 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 25

Going ahead to step 2:
If we divide 64 by 25, we get 2 and a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtracting 50 from 64 leaves us with 14.
Grab the next digit (6) from the dividend, add it to 14, then carry on: 146 / 25

Going ahead to step 3:
25 can be fit into 146 5 times, resulting in a remainder of 21.
Put 5 as the next digit of the answer. 
Result so far: 25.0
If we subtract 125 from 146, we get 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 25

Moving on to step 4:
25 can be fit into 210 8 times, resulting in a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 258.0
Deduct 200 from 210 and we're left with 10.
Include the next digit (7) from the dividend after 10, then repeat: 107 / 25

Going ahead to step 5:
107 divided by 25 is 4 with a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 2584.0
Subtracting 100 from 107 leaves us with 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 25

Let's proceed to step 6:
25 goes into 79 3 times with a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 25843.0
If we take 75 away from 79, 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.

Let's proceed to step 7:
The number 25 fits into 40 1 times, leaving a remainder of 15.
The next digit of our result is 1. 
Result so far: 25843.1
Subtract 25 from 40 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 8:
25 goes into 150 6 times with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 25843.16
Deduct 150 from 150 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.

Let's proceed to step 9:
25 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 25843.16
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.

Moving on to step 10:
25 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 25843.16
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 quotient of the division is 25843.16, and the remainder is 0.0.