We look at the division of 321574 by 1 
Let's see how many times 1 fits into 321574.

Going ahead to step 1:
When dividing 3 by 1, we get 3 with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 3 from 3 to get 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 1

Let's proceed to step 2:
The number 1 fits into 2 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 32.0
If we take 2 away from 2, we end up with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 1

On to step 3:
1 divided by 1 is 1 with a remainder of 0.
Use 1 as the next digit of our solution. 
Result so far: 321.0
The remainder is 0 after subtracting 1 from 1.
Fetch the next digit (5) from the dividend, attach it to 0 and continue: 5 / 1

Advancing to step 4:
1 goes into 5 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 3215.0
Deduct 5 from 5 and we're left with 0.
Append the next digit (7) from the dividend to 0 and continue with: 7 / 1

Let's proceed to step 5:
If we divide 7 by 1, we get 7 and a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 32157.0
Subtract 7 from 7 to get 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 1

Let's proceed to step 6:
When dividing 4 by 1, we get 4 with a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 321574.0
Deduct 4 from 4 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 7:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 321574.0
If we subtract 0 from 0, we 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 8:
If we divide 0 by 1, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 321574.0
Subtracting 0 from 0 leaves us 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.

The final outcome is 321574.0, with a leftover of 0.0.