We're dividing 39521343 by 408 
We want to divide 39521343 by 408.

Let's proceed to step 1:
The number 408 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 408

Advancing to step 2:
The number 408 fits into 39 0 times, leaving a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Grab the next digit (5) from the dividend, add it to 39, then carry on: 395 / 408

Moving on to step 3:
If we divide 395 by 408, we get 0 and a remainder of 395.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 395 and we're left with 395.
Bring next digit (2) of the dividend behind the 395 and repeat the process: 3952 / 408

Advancing to step 4:
408 goes into 3952 9 times with a remainder of 280.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Subtracting 3672 from 3952 leaves us with 280.
Grab the next digit (1) from the dividend, add it to 280, then carry on: 2801 / 408

Step 5:
408 can be fit into 2801 6 times, resulting in a remainder of 353.
Use 6 as the next digit of our solution. 
Result so far: 96.0
Subtracting 2448 from 2801 leaves us with 353.
Bring next digit (3) of the dividend behind the 353 and repeat the process: 3533 / 408

Step 6:
3533 divided by 408 is 8 with a remainder of 269.
The next digit of our result is 8. 
Result so far: 968.0
Deduct 3264 from 3533 and we're left with 269.
Take the next digit (4) from the dividend and append it to 269, then repeat: 2694 / 408

Advancing to step 7:
408 goes into 2694 6 times with a remainder of 246.
Put 6 as the next digit of the answer. 
Result so far: 9686.0
If we subtract 2448 from 2694, we get 246.
Include the next digit (3) from the dividend after 246, then repeat: 2463 / 408

Moving on to step 8:
408 can be fit into 2463 6 times, resulting in a remainder of 15.
Write down 6 as next digit of the result. 
Result so far: 96866.0
If we subtract 2448 from 2463, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
When dividing 150 by 408, we get 0 with a remainder of 150.
The number 0 becomes the next digit in our result. 
Result so far: 96866.0
Deduct 0 from 150 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Moving on to step 10:
1500 divided by 408 is 3 with a remainder of 276.
The number 3 becomes the next digit in our result. 
Result so far: 96866.03
If we take 1224 away from 1500, we end up with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Step 11:
If we divide 2760 by 408, we get 6 and a remainder of 312.
Write down 6 as next digit of the result. 
Result so far: 96866.036
Subtracting 2448 from 2760 leaves us with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Step 12:
408 goes into 3120 7 times with a remainder of 264.
Record the quotient 7 as the next digit in the result. 
Result so far: 96866.0367
Deduct 2856 from 3120 and we're left 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 13:
408 can be fit into 2640 6 times, resulting in a remainder of 192.
Record the quotient 6 as the next digit in the result. 
Result so far: 96866.03676
If we take 2448 away from 2640, we end up with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Step 14:
If we divide 1920 by 408, we get 4 and a remainder of 288.
Use 4 as the next digit of our solution. 
Result so far: 96866.036764
If we take 1632 away from 1920, we end up with 288.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Going ahead to step 15:
408 can be fit into 2880 7 times, resulting in a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 96866.0367647
Subtracting 2856 from 2880 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 16:
408 goes into 240 0 times with a remainder of 240.
Use 0 as the next digit of our solution. 
Result so far: 96866.0367647
If we take 0 away from 240, we end up with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

The final outcome is 96866.0367647, with a leftover of 2.4e-07.