We're dividing 406397 by 17 
We want to figure out the number of times 406397 can be divided by 17.

Moving on to step 1:
When dividing 4 by 17, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 17

Let's proceed to step 2:
The number 17 fits into 40 2 times, leaving a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 34 from 40 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 17

Advancing to step 3:
17 goes into 66 3 times with a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 23.0
If we subtract 51 from 66, we get 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 17

Moving on to step 4:
The number 17 fits into 153 9 times, leaving a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 239.0
The remainder is 0 after subtracting 153 from 153.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 17

Advancing to step 5:
If we divide 9 by 17, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 2390.0
The remainder is 9 after subtracting 0 from 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 17

On to step 6:
If we divide 97 by 17, we get 5 and a remainder of 12.
Use 5 as the next digit of our solution. 
Result so far: 23905.0
Deduct 85 from 97 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.

Going ahead to step 7:
17 can be fit into 120 7 times, resulting in a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 23905.7
If we take 119 away from 120, 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.

On to step 8:
17 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 23905.7
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 9:
17 can be fit into 100 5 times, resulting in a remainder of 15.
The next digit of our result is 5. 
Result so far: 23905.705
If we take 85 away from 100, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 10:
17 goes into 150 8 times with a remainder of 14.
Use 8 as the next digit of our solution. 
Result so far: 23905.7058
If we subtract 136 from 150, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 11:
140 divided by 17 is 8 with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 23905.70588
Deduct 136 from 140 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 23905.70588 with a remaining 4e-06.