We look at the division of 45369103 by 339 
We want to divide 45369103 by 339.

On to step 1:
4 divided by 339 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 339

On to step 2:
339 goes into 45 0 times with a remainder of 45.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 45 to get 45.
Include the next digit (3) from the dividend after 45, then repeat: 453 / 339

Step 3:
339 goes into 453 1 times with a remainder of 114.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 339 from 453, we get 114.
Include the next digit (6) from the dividend after 114, then repeat: 1146 / 339

Let's proceed to step 4:
339 goes into 1146 3 times with a remainder of 129.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we take 1017 away from 1146, we end up with 129.
Take the next digit (9) from the dividend and append it to 129, then repeat: 1299 / 339

Going ahead to step 5:
The number 339 fits into 1299 3 times, leaving a remainder of 282.
The next digit of our result is 3. 
Result so far: 133.0
If we subtract 1017 from 1299, we get 282.
Fetch the next digit (1) from the dividend, attach it to 282 and continue: 2821 / 339

Moving on to step 6:
339 goes into 2821 8 times with a remainder of 109.
Write down 8 as next digit of the result. 
Result so far: 1338.0
Subtracting 2712 from 2821 leaves us with 109.
Grab the next digit (0) from the dividend, add it to 109, then carry on: 1090 / 339

Let's proceed to step 7:
If we divide 1090 by 339, we get 3 and a remainder of 73.
Use 3 as the next digit of our solution. 
Result so far: 13383.0
If we subtract 1017 from 1090, we get 73.
Grab the next digit (3) from the dividend, add it to 73, then carry on: 733 / 339

Step 8:
339 goes into 733 2 times with a remainder of 55.
Put 2 as the next digit of the answer. 
Result so far: 133832.0
Subtracting 678 from 733 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 9:
If we divide 550 by 339, we get 1 and a remainder of 211.
Put 1 as the next digit of the answer. 
Result so far: 133832.1
Subtracting 339 from 550 leaves us with 211.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2110, and continue the process.

Going ahead to step 10:
The number 339 fits into 2110 6 times, leaving a remainder of 76.
Record the quotient 6 as the next digit in the result. 
Result so far: 133832.16
Deduct 2034 from 2110 and we're left 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.

On to step 11:
If we divide 760 by 339, we get 2 and a remainder of 82.
The next digit of our result is 2. 
Result so far: 133832.162
The remainder is 82 after subtracting 678 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 12:
If we divide 820 by 339, we get 2 and a remainder of 142.
Put 2 as the next digit of the answer. 
Result so far: 133832.1622
Deduct 678 from 820 and we're left with 142.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1420, and continue the process.

The final outcome is 133832.1622, with a leftover of 0.00142.