We look at the division of 143397 by 1 
We're looking to find how many times 1 goes into 143397.

Moving on to step 1:
When dividing 1 by 1, we get 1 with a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 1 from 1 leaves us with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 1

Going ahead to step 2:
When dividing 4 by 1, we get 4 with a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we take 4 away from 4, we end up with 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 1

Advancing to step 3:
If we divide 3 by 1, we get 3 and a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 143.0
Subtract 3 from 3 to get 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 1

Let's proceed to step 4:
3 divided by 1 is 3 with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 1433.0
If we take 3 away from 3, we end up with 0.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 1

On to step 5:
1 goes into 9 9 times with a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 14339.0
The remainder is 0 after subtracting 9 from 9.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 1

Advancing to step 6:
1 goes into 7 7 times with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 143397.0
Subtract 7 from 7 to 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 7:
0 divided by 1 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 143397.0
If we take 0 away from 0, 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.

Moving on to step 8:
When dividing 0 by 1, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 143397.0
Deduct 0 from 0 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.

Our division results in 143397.0 with a remaining 0.0.