We look at the division of 428543 by 1 
We want to divide 428543 by 1.

Step 1:
1 goes into 4 4 times with a remainder of 0.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 0 after subtracting 4 from 4.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 1

On to step 2:
1 can be fit into 2 2 times, resulting in a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 42.0
Subtracting 2 from 2 leaves us with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 1

On to step 3:
When dividing 8 by 1, we get 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 428.0
Deduct 8 from 8 and we're left with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 1

Let's proceed to step 4:
1 goes into 5 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 4285.0
The remainder is 0 after subtracting 5 from 5.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 1

Going ahead to step 5:
The number 1 fits into 4 4 times, leaving a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 42854.0
Subtract 4 from 4 to get 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 1

Step 6:
The number 1 fits into 3 3 times, leaving a remainder of 0.
The next digit of our result is 3. 
Result so far: 428543.0
Deduct 3 from 3 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.

Let's proceed to step 7:
When dividing 0 by 1, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 428543.0
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.

Moving on to step 8:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 428543.0
Subtract 0 from 0 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.

The final result is 428543.0 with a remainder of 0.0.