We're dividing 5416399 by 409 
We want to figure out the number of times 5416399 can be divided by 409.

Advancing to step 1:
5 divided by 409 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 409

Moving on to step 2:
409 goes into 54 0 times with a remainder of 54.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 54, we end up with 54.
Fetch the next digit (1) from the dividend, attach it to 54 and continue: 541 / 409

Moving on to step 3:
The number 409 fits into 541 1 times, leaving a remainder of 132.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 409 from 541 leaves us with 132.
Append the next digit (6) from the dividend to 132 and continue with: 1326 / 409

On to step 4:
409 can be fit into 1326 3 times, resulting in a remainder of 99.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we subtract 1227 from 1326, we get 99.
Grab the next digit (3) from the dividend, add it to 99, then carry on: 993 / 409

Going ahead to step 5:
993 divided by 409 is 2 with a remainder of 175.
Put 2 as the next digit of the answer. 
Result so far: 132.0
Deduct 818 from 993 and we're left with 175.
Include the next digit (9) from the dividend after 175, then repeat: 1759 / 409

On to step 6:
The number 409 fits into 1759 4 times, leaving a remainder of 123.
Record the quotient 4 as the next digit in the result. 
Result so far: 1324.0
Subtracting 1636 from 1759 leaves us with 123.
Take the next digit (9) from the dividend and append it to 123, then repeat: 1239 / 409

Let's proceed to step 7:
If we divide 1239 by 409, we get 3 and a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 13243.0
If we take 1227 away from 1239, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 8:
120 divided by 409 is 0 with a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 13243.0
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 9:
When dividing 1200 by 409, we get 2 with a remainder of 382.
Write down 2 as next digit of the result. 
Result so far: 13243.02
The remainder is 382 after subtracting 818 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

On to step 10:
3820 divided by 409 is 9 with a remainder of 139.
Put 9 as the next digit of the answer. 
Result so far: 13243.029
Subtracting 3681 from 3820 leaves us with 139.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1390, and continue the process.

Advancing to step 11:
409 goes into 1390 3 times with a remainder of 163.
Write down 3 as next digit of the result. 
Result so far: 13243.0293
Deduct 1227 from 1390 and we're left with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Moving on to step 12:
409 goes into 1630 3 times with a remainder of 403.
The next digit of our result is 3. 
Result so far: 13243.02933
If we subtract 1227 from 1630, we get 403.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4030, and continue the process.

Our division results in 13243.02933 with a remaining 0.000403.