We look at the division of 34390866 by 321 
Let's see how many times 321 fits into 34390866.

On to step 1:
The number 321 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (4) from the dividend to 3 and continue with: 34 / 321

Let's proceed to step 2:
34 divided by 321 is 0 with a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 34, we end up with 34.
Take the next digit (3) from the dividend and append it to 34, then repeat: 343 / 321

Let's proceed to step 3:
321 can be fit into 343 1 times, resulting in a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 321 from 343 to get 22.
Take the next digit (9) from the dividend and append it to 22, then repeat: 229 / 321

Going ahead to step 4:
321 goes into 229 0 times with a remainder of 229.
Write down 0 as next digit of the result. 
Result so far: 10.0
The remainder is 229 after subtracting 0 from 229.
Grab the next digit (0) from the dividend, add it to 229, then carry on: 2290 / 321

Going ahead to step 5:
If we divide 2290 by 321, we get 7 and a remainder of 43.
The next digit of our result is 7. 
Result so far: 107.0
Subtracting 2247 from 2290 leaves us with 43.
Include the next digit (8) from the dividend after 43, then repeat: 438 / 321

On to step 6:
If we divide 438 by 321, we get 1 and a remainder of 117.
Put 1 as the next digit of the answer. 
Result so far: 1071.0
The remainder is 117 after subtracting 321 from 438.
Append the next digit (6) from the dividend to 117 and continue with: 1176 / 321

Moving on to step 7:
When dividing 1176 by 321, we get 3 with a remainder of 213.
The number 3 becomes the next digit in our result. 
Result so far: 10713.0
If we take 963 away from 1176, we end up with 213.
Append the next digit (6) from the dividend to 213 and continue with: 2136 / 321

Moving on to step 8:
If we divide 2136 by 321, we get 6 and a remainder of 210.
Use 6 as the next digit of our solution. 
Result so far: 107136.0
If we subtract 1926 from 2136, we get 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 9:
2100 divided by 321 is 6 with a remainder of 174.
Use 6 as the next digit of our solution. 
Result so far: 107136.6
The remainder is 174 after subtracting 1926 from 2100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1740, and continue the process.

Step 10:
321 goes into 1740 5 times with a remainder of 135.
Put 5 as the next digit of the answer. 
Result so far: 107136.65
Subtracting 1605 from 1740 leaves us with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Moving on to step 11:
If we divide 1350 by 321, we get 4 and a remainder of 66.
Record the quotient 4 as the next digit in the result. 
Result so far: 107136.654
Subtracting 1284 from 1350 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.

Let's proceed to step 12:
321 can be fit into 660 2 times, resulting in a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 107136.6542
Subtract 642 from 660 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 13:
The number 321 fits into 180 0 times, leaving a remainder of 180.
Use 0 as the next digit of our solution. 
Result so far: 107136.6542
If we take 0 away from 180, we end up with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 14:
1800 divided by 321 is 5 with a remainder of 195.
Record the quotient 5 as the next digit in the result. 
Result so far: 107136.654205
The remainder is 195 after subtracting 1605 from 1800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 15:
When dividing 1950 by 321, we get 6 with a remainder of 24.
Write down 6 as next digit of the result. 
Result so far: 107136.6542056
If we take 1926 away from 1950, we end up 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:
240 divided by 321 is 0 with a remainder of 240.
Write down 0 as next digit of the result. 
Result so far: 107136.6542056
The remainder is 240 after subtracting 0 from 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 result is 107136.6542056 with a remainder of 2.4e-07.