We look at the division of 34245121 by 321 
Let's see how many times 321 fits into 34245121.

Let's proceed to step 1:
When dividing 3 by 321, we get 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 321

On to step 2:
321 goes into 34 0 times with a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 34 and we're left with 34.
Grab the next digit (2) from the dividend, add it to 34, then carry on: 342 / 321

Moving on to step 3:
When dividing 342 by 321, we get 1 with a remainder of 21.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 321 from 342 and we're left with 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 321

Let's proceed to step 4:
321 goes into 214 0 times with a remainder of 214.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtracting 0 from 214 leaves us with 214.
Append the next digit (5) from the dividend to 214 and continue with: 2145 / 321

On to step 5:
321 can be fit into 2145 6 times, resulting in a remainder of 219.
Use 6 as the next digit of our solution. 
Result so far: 106.0
If we take 1926 away from 2145, we end up with 219.
Fetch the next digit (1) from the dividend, attach it to 219 and continue: 2191 / 321

Let's proceed to step 6:
When dividing 2191 by 321, we get 6 with a remainder of 265.
Use 6 as the next digit of our solution. 
Result so far: 1066.0
If we subtract 1926 from 2191, we get 265.
Bring next digit (2) of the dividend behind the 265 and repeat the process: 2652 / 321

Moving on to step 7:
If we divide 2652 by 321, we get 8 and a remainder of 84.
Use 8 as the next digit of our solution. 
Result so far: 10668.0
If we subtract 2568 from 2652, we get 84.
Append the next digit (1) from the dividend to 84 and continue with: 841 / 321

Step 8:
When dividing 841 by 321, we get 2 with a remainder of 199.
Write down 2 as next digit of the result. 
Result so far: 106682.0
The remainder is 199 after subtracting 642 from 841.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1990, and continue the process.

Step 9:
The number 321 fits into 1990 6 times, leaving a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 106682.6
If we subtract 1926 from 1990, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 10:
321 goes into 640 1 times with a remainder of 319.
Record the quotient 1 as the next digit in the result. 
Result so far: 106682.61
Subtracting 321 from 640 leaves us with 319.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3190, and continue the process.

On to step 11:
When dividing 3190 by 321, we get 9 with a remainder of 301.
Record the quotient 9 as the next digit in the result. 
Result so far: 106682.619
Subtracting 2889 from 3190 leaves us with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

Moving on to step 12:
3010 divided by 321 is 9 with a remainder of 121.
The number 9 becomes the next digit in our result. 
Result so far: 106682.6199
Subtracting 2889 from 3010 leaves us with 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1210, and continue the process.

The quotient of the division is 106682.6199, and the remainder is 0.00121.