We look at the division of 64869631 by 321 
We're looking to find how many times 321 goes into 64869631.

Going ahead to step 1:
321 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 321

Step 2:
321 can be fit into 64 0 times, resulting in a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Include the next digit (8) from the dividend after 64, then repeat: 648 / 321

Let's proceed to step 3:
321 goes into 648 2 times with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtract 642 from 648 to get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 321

Let's proceed to step 4:
321 goes into 66 0 times with a remainder of 66.
The next digit of our result is 0. 
Result so far: 20.0
Subtracting 0 from 66 leaves us with 66.
Grab the next digit (9) from the dividend, add it to 66, then carry on: 669 / 321

Advancing to step 5:
If we divide 669 by 321, we get 2 and a remainder of 27.
The next digit of our result is 2. 
Result so far: 202.0
Subtracting 642 from 669 leaves us with 27.
Include the next digit (6) from the dividend after 27, then repeat: 276 / 321

Moving on to step 6:
When dividing 276 by 321, we get 0 with a remainder of 276.
The number 0 becomes the next digit in our result. 
Result so far: 2020.0
If we take 0 away from 276, we end up with 276.
Append the next digit (3) from the dividend to 276 and continue with: 2763 / 321

Step 7:
The number 321 fits into 2763 8 times, leaving a remainder of 195.
The number 8 becomes the next digit in our result. 
Result so far: 20208.0
If we take 2568 away from 2763, we end up with 195.
Bring next digit (1) of the dividend behind the 195 and repeat the process: 1951 / 321

Step 8:
1951 divided by 321 is 6 with a remainder of 25.
Write down 6 as next digit of the result. 
Result so far: 202086.0
If we subtract 1926 from 1951, we get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Advancing to step 9:
The number 321 fits into 250 0 times, leaving a remainder of 250.
The number 0 becomes the next digit in our result. 
Result so far: 202086.0
If we subtract 0 from 250, we get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 10:
The number 321 fits into 2500 7 times, leaving a remainder of 253.
The next digit of our result is 7. 
Result so far: 202086.07
Subtract 2247 from 2500 to get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Going ahead to step 11:
If we divide 2530 by 321, we get 7 and a remainder of 283.
Write down 7 as next digit of the result. 
Result so far: 202086.077
Subtracting 2247 from 2530 leaves us with 283.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2830, and continue the process.

The final outcome is 202086.077, with a leftover of 0.0283.