409687 ÷ 25 
We want to divide 409687 by 25.

On to step 1:
25 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (0) from the dividend, add it to 4, then carry on: 40 / 25

Moving on to step 2:
The number 25 fits into 40 1 times, leaving a remainder of 15.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 25 from 40 leaves us with 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 25

Moving on to step 3:
When dividing 159 by 25, we get 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 16.0
The remainder is 9 after subtracting 150 from 159.
Include the next digit (6) from the dividend after 9, then repeat: 96 / 25

Advancing to step 4:
If we divide 96 by 25, we get 3 and a remainder of 21.
Write down 3 as next digit of the result. 
Result so far: 163.0
If we subtract 75 from 96, we get 21.
Fetch the next digit (8) from the dividend, attach it to 21 and continue: 218 / 25

Going ahead to step 5:
When dividing 218 by 25, we get 8 with a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 1638.0
If we subtract 200 from 218, we get 18.
Fetch the next digit (7) from the dividend, attach it to 18 and continue: 187 / 25

Moving on to step 6:
The number 25 fits into 187 7 times, leaving a remainder of 12.
Put 7 as the next digit of the answer. 
Result so far: 16387.0
Deduct 175 from 187 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
120 divided by 25 is 4 with a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 16387.4
Deduct 100 from 120 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
The number 25 fits into 200 8 times, leaving a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 16387.48
Subtracting 200 from 200 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.

Step 9:
When dividing 0 by 25, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 16387.48
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.

Moving on to step 10:
25 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 16387.48
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.

The final outcome is 16387.48, with a leftover of 0.0.