We're dividing 401724 by 12 
We want to figure out the number of times 401724 can be divided by 12.

Going ahead to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 12

Going ahead to step 2:
When dividing 40 by 12, we get 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
The remainder is 4 after subtracting 36 from 40.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 12

Advancing to step 3:
The number 12 fits into 41 3 times, leaving a remainder of 5.
The next digit of our result is 3. 
Result so far: 33.0
Subtract 36 from 41 to get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 12

Let's proceed to step 4:
When dividing 57 by 12, we get 4 with a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 334.0
Subtracting 48 from 57 leaves us with 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 12

Step 5:
The number 12 fits into 92 7 times, leaving a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 3347.0
Deduct 84 from 92 and we're left with 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 12

Advancing to step 6:
12 can be fit into 84 7 times, resulting in a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 33477.0
If we take 84 away from 84, 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.

Going ahead to step 7:
If we divide 0 by 12, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 33477.0
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.

Let's proceed to step 8:
The number 12 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 33477.0
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 33477.0, with a leftover of 0.0.