Let's divide 8170408 by 321
We're looking to find how many times 321 goes into 8170408.

Step 1:
8 divided by 321 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 321

Going ahead to step 2:
When dividing 81 by 321, we get 0 with a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Bring next digit (7) of the dividend behind the 81 and repeat the process: 817 / 321

Let's proceed to step 3:
321 goes into 817 2 times with a remainder of 175.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 175 after subtracting 642 from 817.
Bring next digit (0) of the dividend behind the 175 and repeat the process: 1750 / 321

Advancing to step 4:
1750 divided by 321 is 5 with a remainder of 145.
Use 5 as the next digit of our solution. 
Result so far: 25.0
The remainder is 145 after subtracting 1605 from 1750.
Include the next digit (4) from the dividend after 145, then repeat: 1454 / 321

Moving on to step 5:
If we divide 1454 by 321, we get 4 and a remainder of 170.
Use 4 as the next digit of our solution. 
Result so far: 254.0
Subtracting 1284 from 1454 leaves us with 170.
Fetch the next digit (0) from the dividend, attach it to 170 and continue: 1700 / 321

Step 6:
When dividing 1700 by 321, we get 5 with a remainder of 95.
Record the quotient 5 as the next digit in the result. 
Result so far: 2545.0
Subtracting 1605 from 1700 leaves us with 95.
Include the next digit (8) from the dividend after 95, then repeat: 958 / 321

Moving on to step 7:
321 goes into 958 2 times with a remainder of 316.
Record the quotient 2 as the next digit in the result. 
Result so far: 25452.0
The remainder is 316 after subtracting 642 from 958.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

Advancing to step 8:
321 can be fit into 3160 9 times, resulting in a remainder of 271.
Use 9 as the next digit of our solution. 
Result so far: 25452.9
Subtract 2889 from 3160 to get 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Let's proceed to step 9:
321 goes into 2710 8 times with a remainder of 142.
Use 8 as the next digit of our solution. 
Result so far: 25452.98
Subtract 2568 from 2710 to get 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

Let's proceed to step 10:
When dividing 1420 by 321, we get 4 with a remainder of 136.
Write down 4 as next digit of the result. 
Result so far: 25452.984
If we subtract 1284 from 1420, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Going ahead to step 11:
1360 divided by 321 is 4 with a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 25452.9844
Subtracting 1284 from 1360 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final result is 25452.9844 with a remainder of 0.00076.