403851 ÷ 26 
Our goal is to divide 403851 by 26.

Let's proceed to step 1:
If we divide 4 by 26, we get 0 and a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 26

Step 2:
If we divide 40 by 26, we get 1 and a remainder of 14.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 26 from 40 to get 14.
Grab the next digit (3) from the dividend, add it to 14, then carry on: 143 / 26

Moving on to step 3:
26 can be fit into 143 5 times, resulting in a remainder of 13.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
If we subtract 130 from 143, we get 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 26

On to step 4:
26 can be fit into 138 5 times, resulting in a remainder of 8.
The next digit of our result is 5. 
Result so far: 155.0
Subtract 130 from 138 to get 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 26

Moving on to step 5:
85 divided by 26 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 1553.0
If we take 78 away from 85, we end up with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 26

On to step 6:
71 divided by 26 is 2 with a remainder of 19.
The number 2 becomes the next digit in our result. 
Result so far: 15532.0
Subtract 52 from 71 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
26 can be fit into 190 7 times, resulting in a remainder of 8.
Use 7 as the next digit of our solution. 
Result so far: 15532.7
Subtracting 182 from 190 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.

Going ahead to step 8:
26 can be fit into 80 3 times, resulting in a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 15532.73
Subtracting 78 from 80 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
26 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 15532.73
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 10:
200 divided by 26 is 7 with a remainder of 18.
The next digit of our result is 7. 
Result so far: 15532.7307
Deduct 182 from 200 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 11:
180 divided by 26 is 6 with a remainder of 24.
The next digit of our result is 6. 
Result so far: 15532.73076
If we take 156 away from 180, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 12:
240 divided by 26 is 9 with a remainder of 6.
Put 9 as the next digit of the answer. 
Result so far: 15532.730769
Subtract 234 from 240 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 13:
If we divide 60 by 26, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 15532.7307692
Subtracting 52 from 60 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.

Advancing to step 14:
26 goes into 80 3 times with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 15532.73076923
Deduct 78 from 80 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 15532.73076923 with a remainder of 2e-09.