431172 ÷ 1 
Let's see how many times 1 fits into 431172.

Advancing to step 1:
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: 4.0
The remainder is 0 after subtracting 4 from 4.
Append the next digit (3) from the dividend to 0 and continue with: 3 / 1

Let's proceed to step 2:
If we divide 3 by 1, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 43.0
If we subtract 3 from 3, we get 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 1

Going ahead to step 3:
1 can be fit into 1 1 times, resulting in a remainder of 0.
The next digit of our result is 1. 
Result so far: 431.0
The remainder is 0 after subtracting 1 from 1.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 1

Step 4:
The number 1 fits into 1 1 times, leaving a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 4311.0
Subtract 1 from 1 to get 0.
Take the next digit (7) from the dividend and append it to 0, then repeat: 7 / 1

On to step 5:
1 goes into 7 7 times with a remainder of 0.
Put 7 as the next digit of the answer. 
Result so far: 43117.0
If we subtract 7 from 7, we get 0.
Grab the next digit (2) from the dividend, add it to 0, then carry on: 2 / 1

On to step 6:
When dividing 2 by 1, we get 2 with a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 431172.0
If we subtract 2 from 2, 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 7:
If we divide 0 by 1, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 431172.0
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.

Let's proceed to step 8:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 431172.0
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.

The final outcome is 431172.0, with a leftover of 0.0.