We're dividing 18303458 by 513 
Our goal is to divide 18303458 by 513.

Let's proceed to step 1:
When dividing 1 by 513, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 513

Step 2:
513 goes into 18 0 times with a remainder of 18.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 18, we end up with 18.
Take the next digit (3) from the dividend and append it to 18, then repeat: 183 / 513

Moving on to step 3:
183 divided by 513 is 0 with a remainder of 183.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 183 leaves us with 183.
Append the next digit (0) from the dividend to 183 and continue with: 1830 / 513

Step 4:
513 can be fit into 1830 3 times, resulting in a remainder of 291.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 1539 from 1830 to get 291.
Append the next digit (3) from the dividend to 291 and continue with: 2913 / 513

On to step 5:
513 can be fit into 2913 5 times, resulting in a remainder of 348.
Put 5 as the next digit of the answer. 
Result so far: 35.0
If we subtract 2565 from 2913, we get 348.
Include the next digit (4) from the dividend after 348, then repeat: 3484 / 513

On to step 6:
When dividing 3484 by 513, we get 6 with a remainder of 406.
Use 6 as the next digit of our solution. 
Result so far: 356.0
If we subtract 3078 from 3484, we get 406.
Take the next digit (5) from the dividend and append it to 406, then repeat: 4065 / 513

On to step 7:
If we divide 4065 by 513, we get 7 and a remainder of 474.
Put 7 as the next digit of the answer. 
Result so far: 3567.0
If we take 3591 away from 4065, we end up with 474.
Bring next digit (8) of the dividend behind the 474 and repeat the process: 4748 / 513

Advancing to step 8:
When dividing 4748 by 513, we get 9 with a remainder of 131.
Write down 9 as next digit of the result. 
Result so far: 35679.0
Subtracting 4617 from 4748 leaves us with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Step 9:
When dividing 1310 by 513, we get 2 with a remainder of 284.
Put 2 as the next digit of the answer. 
Result so far: 35679.2
Deduct 1026 from 1310 and we're left with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Step 10:
2840 divided by 513 is 5 with a remainder of 275.
The number 5 becomes the next digit in our result. 
Result so far: 35679.25
Subtract 2565 from 2840 to get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Moving on to step 11:
The number 513 fits into 2750 5 times, leaving a remainder of 185.
The number 5 becomes the next digit in our result. 
Result so far: 35679.255
Subtracting 2565 from 2750 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

After the division, we end up with 35679.255 and a remainder of 0.0185.