We look at the division of 1405911 by 399 
We're looking to find how many times 399 goes into 1405911.

Moving on to step 1:
The number 399 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (4) of the dividend behind the 1 and repeat the process: 14 / 399

Step 2:
14 divided by 399 is 0 with a remainder of 14.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 14, we end up with 14.
Include the next digit (0) from the dividend after 14, then repeat: 140 / 399

Step 3:
399 goes into 140 0 times with a remainder of 140.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 140, we end up with 140.
Grab the next digit (5) from the dividend, add it to 140, then carry on: 1405 / 399

Going ahead to step 4:
1405 divided by 399 is 3 with a remainder of 208.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 1197 from 1405, we get 208.
Grab the next digit (9) from the dividend, add it to 208, then carry on: 2089 / 399

Going ahead to step 5:
399 goes into 2089 5 times with a remainder of 94.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
If we subtract 1995 from 2089, we get 94.
Append the next digit (1) from the dividend to 94 and continue with: 941 / 399

Step 6:
When dividing 941 by 399, we get 2 with a remainder of 143.
The next digit of our result is 2. 
Result so far: 352.0
Subtracting 798 from 941 leaves us with 143.
Take the next digit (1) from the dividend and append it to 143, then repeat: 1431 / 399

Let's proceed to step 7:
If we divide 1431 by 399, we get 3 and a remainder of 234.
The number 3 becomes the next digit in our result. 
Result so far: 3523.0
The remainder is 234 after subtracting 1197 from 1431.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Let's proceed to step 8:
2340 divided by 399 is 5 with a remainder of 345.
Write down 5 as next digit of the result. 
Result so far: 3523.5
The remainder is 345 after subtracting 1995 from 2340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Advancing to step 9:
When dividing 3450 by 399, we get 8 with a remainder of 258.
Put 8 as the next digit of the answer. 
Result so far: 3523.58
Subtracting 3192 from 3450 leaves us with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

On to step 10:
The number 399 fits into 2580 6 times, leaving a remainder of 186.
Record the quotient 6 as the next digit in the result. 
Result so far: 3523.586
Deduct 2394 from 2580 and we're left with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Let's proceed to step 11:
1860 divided by 399 is 4 with a remainder of 264.
Write down 4 as next digit of the result. 
Result so far: 3523.5864
Subtracting 1596 from 1860 leaves us with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Advancing to step 12:
When dividing 2640 by 399, we get 6 with a remainder of 246.
Write down 6 as next digit of the result. 
Result so far: 3523.58646
The remainder is 246 after subtracting 2394 from 2640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Going ahead to step 13:
399 can be fit into 2460 6 times, resulting in a remainder of 66.
Write down 6 as next digit of the result. 
Result so far: 3523.586466
Subtracting 2394 from 2460 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

The final outcome is 3523.586466, with a leftover of 6.6e-06.