We're dividing 25603917 by 2 
Our goal is to divide 25603917 by 2.

Advancing to step 1:
2 goes into 2 1 times with a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 2 from 2 leaves us with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 2

Moving on to step 2:
2 can be fit into 5 2 times, resulting in a remainder of 1.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 4 away from 5, we end up with 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 2

Step 3:
16 divided by 2 is 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 128.0
Deduct 16 from 16 and we're left with 0.
Include the next digit (0) from the dividend after 0, then repeat: 0 / 2

Going ahead to step 4:
2 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 1280.0
The remainder is 0 after subtracting 0 from 0.
Take the next digit (3) from the dividend and append it to 0, then repeat: 3 / 2

Step 5:
2 goes into 3 1 times with a remainder of 1.
The next digit of our result is 1. 
Result so far: 12801.0
If we subtract 2 from 3, we get 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 2

Let's proceed to step 6:
19 divided by 2 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 128019.0
Subtract 18 from 19 to get 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 2

Advancing to step 7:
11 divided by 2 is 5 with a remainder of 1.
The next digit of our result is 5. 
Result so far: 1280195.0
If we take 10 away from 11, we end up with 1.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 2

Going ahead to step 8:
If we divide 17 by 2, we get 8 and a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 12801958.0
If we take 16 away from 17, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
2 can be fit into 10 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 12801958.5
If we take 10 away from 10, 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.

Step 10:
0 divided by 2 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12801958.5
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.

Let's proceed to step 11:
When dividing 0 by 2, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 12801958.5
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 12801958.5, with a leftover of 0.0.