We're dividing 39999716 by 405 
Our goal is to divide 39999716 by 405.

On to step 1:
The number 405 fits into 3 0 times, leaving a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 405

Step 2:
405 can be fit into 39 0 times, resulting in a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Fetch the next digit (9) from the dividend, attach it to 39 and continue: 399 / 405

Step 3:
405 goes into 399 0 times with a remainder of 399.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 399 after subtracting 0 from 399.
Include the next digit (9) from the dividend after 399, then repeat: 3999 / 405

Step 4:
3999 divided by 405 is 9 with a remainder of 354.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 3645 from 3999 to get 354.
Take the next digit (9) from the dividend and append it to 354, then repeat: 3549 / 405

Advancing to step 5:
405 can be fit into 3549 8 times, resulting in a remainder of 309.
The number 8 becomes the next digit in our result. 
Result so far: 98.0
Subtracting 3240 from 3549 leaves us with 309.
Append the next digit (7) from the dividend to 309 and continue with: 3097 / 405

Going ahead to step 6:
The number 405 fits into 3097 7 times, leaving a remainder of 262.
Record the quotient 7 as the next digit in the result. 
Result so far: 987.0
The remainder is 262 after subtracting 2835 from 3097.
Include the next digit (1) from the dividend after 262, then repeat: 2621 / 405

Moving on to step 7:
405 goes into 2621 6 times with a remainder of 191.
The next digit of our result is 6. 
Result so far: 9876.0
The remainder is 191 after subtracting 2430 from 2621.
Bring next digit (6) of the dividend behind the 191 and repeat the process: 1916 / 405

Moving on to step 8:
If we divide 1916 by 405, we get 4 and a remainder of 296.
Use 4 as the next digit of our solution. 
Result so far: 98764.0
Subtract 1620 from 1916 to get 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

On to step 9:
The number 405 fits into 2960 7 times, leaving a remainder of 125.
Write down 7 as next digit of the result. 
Result so far: 98764.7
Subtract 2835 from 2960 to get 125.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Moving on to step 10:
If we divide 1250 by 405, we get 3 and a remainder of 35.
The number 3 becomes the next digit in our result. 
Result so far: 98764.73
Subtracting 1215 from 1250 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 11:
The number 405 fits into 350 0 times, leaving a remainder of 350.
Write down 0 as next digit of the result. 
Result so far: 98764.73
If we subtract 0 from 350, we get 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

On to step 12:
405 can be fit into 3500 8 times, resulting in a remainder of 260.
Put 8 as the next digit of the answer. 
Result so far: 98764.7308
Deduct 3240 from 3500 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Moving on to step 13:
405 can be fit into 2600 6 times, resulting in a remainder of 170.
Record the quotient 6 as the next digit in the result. 
Result so far: 98764.73086
The remainder is 170 after subtracting 2430 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

On to step 14:
If we divide 1700 by 405, we get 4 and a remainder of 80.
Write down 4 as next digit of the result. 
Result so far: 98764.730864
If we take 1620 away from 1700, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 15:
The number 405 fits into 800 1 times, leaving a remainder of 395.
Write down 1 as next digit of the result. 
Result so far: 98764.7308641
The remainder is 395 after subtracting 405 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Let's proceed to step 16:
3950 divided by 405 is 9 with a remainder of 305.
The next digit of our result is 9. 
Result so far: 98764.73086419
Subtracting 3645 from 3950 leaves us with 305.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

The final result is 98764.73086419 with a remainder of 3.05e-07.