We look at the division of 126451 by 9 
We're looking to find how many times 9 goes into 126451.

Moving on to step 1:
9 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 9

On to step 2:
If we divide 12 by 9, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 9 away from 12, we end up with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 9

Moving on to step 3:
9 can be fit into 36 4 times, resulting in a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtracting 36 from 36 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 9

Step 4:
9 goes into 4 0 times with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 140.0
If we take 0 away from 4, we end up with 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 9

Let's proceed to step 5:
9 goes into 45 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 1405.0
Subtracting 45 from 45 leaves us with 0.
Include the next digit (1) from the dividend after 0, then repeat: 1 / 9

Going ahead to step 6:
The number 9 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 14050.0
If we take 0 away from 1, 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.

Going ahead to step 7:
If we divide 10 by 9, we get 1 and a remainder of 1.
The next digit of our result is 1. 
Result so far: 14050.1
Deduct 9 from 10 and we're left 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.

Let's proceed to step 8:
When dividing 10 by 9, we get 1 with a remainder of 1.
Put 1 as the next digit of the answer. 
Result so far: 14050.11
If we subtract 9 from 10, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 14050.11, with a leftover of 0.001.