We look at the division of 25850558 by 16 
We're looking to find how many times 16 goes into 25850558.

Let's proceed to step 1:
The number 16 fits into 2 0 times, leaving a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 16

Advancing to step 2:
When dividing 25 by 16, we get 1 with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 16 from 25 leaves us with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 16

Let's proceed to step 3:
The number 16 fits into 98 6 times, leaving a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Subtracting 96 from 98 leaves us with 2.
Grab the next digit (5) from the dividend, add it to 2, then carry on: 25 / 16

Moving on to step 4:
If we divide 25 by 16, we get 1 and a remainder of 9.
The next digit of our result is 1. 
Result so far: 161.0
The remainder is 9 after subtracting 16 from 25.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 16

Going ahead to step 5:
90 divided by 16 is 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 1615.0
Subtract 80 from 90 to get 10.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 16

Moving on to step 6:
16 goes into 105 6 times with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 16156.0
If we take 96 away from 105, we end up with 9.
Bring next digit (5) of the dividend behind the 9 and repeat the process: 95 / 16

Moving on to step 7:
16 goes into 95 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 161565.0
If we take 80 away from 95, we end up with 15.
Include the next digit (8) from the dividend after 15, then repeat: 158 / 16

Moving on to step 8:
The number 16 fits into 158 9 times, leaving a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 1615659.0
If we take 144 away from 158, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 9:
If we divide 140 by 16, we get 8 and a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 1615659.8
If we subtract 128 from 140, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 10:
16 goes into 120 7 times with a remainder of 8.
The number 7 becomes the next digit in our result. 
Result so far: 1615659.87
Subtracting 112 from 120 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 11:
If we divide 80 by 16, we get 5 and a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 1615659.875
Deduct 80 from 80 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.

Step 12:
16 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 1615659.875
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.

Advancing to step 13:
The number 16 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1615659.875
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.

The final result is 1615659.875 with a remainder of 0.0.