We divide 407143 by 12
Let's see how many times 12 fits into 407143.

On 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
Deduct 0 from 4 and we're left with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 12

Step 2:
12 goes into 40 3 times with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 36 from 40 to get 4.
Fetch the next digit (7) from the dividend, attach it to 4 and continue: 47 / 12

Let's proceed to step 3:
The number 12 fits into 47 3 times, leaving a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 33.0
Subtract 36 from 47 to get 11.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 12

Advancing to step 4:
The number 12 fits into 111 9 times, leaving a remainder of 3.
Put 9 as the next digit of the answer. 
Result so far: 339.0
Deduct 108 from 111 and we're left with 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 12

Let's proceed to step 5:
The number 12 fits into 34 2 times, leaving a remainder of 10.
The next digit of our result is 2. 
Result so far: 3392.0
If we take 24 away from 34, we end up with 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 12

Step 6:
When dividing 103 by 12, we get 8 with a remainder of 7.
Put 8 as the next digit of the answer. 
Result so far: 33928.0
Deduct 96 from 103 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
12 goes into 70 5 times with a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 33928.5
Deduct 60 from 70 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 33928.58
If we take 96 away from 100, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 33928.583
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
40 divided by 12 is 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 33928.5833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 33928.5833, with a leftover of 4e-05.