15180294 divided by 645 
We want to divide 15180294 by 645.

Advancing to step 1:
When dividing 1 by 645, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 645

On to step 2:
When dividing 15 by 645, we get 0 with a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 645

Advancing to step 3:
When dividing 151 by 645, we get 0 with a remainder of 151.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 151 to get 151.
Bring next digit (8) of the dividend behind the 151 and repeat the process: 1518 / 645

Let's proceed to step 4:
645 can be fit into 1518 2 times, resulting in a remainder of 228.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 1290 from 1518 to get 228.
Include the next digit (0) from the dividend after 228, then repeat: 2280 / 645

Moving on to step 5:
645 can be fit into 2280 3 times, resulting in a remainder of 345.
Record the quotient 3 as the next digit in the result. 
Result so far: 23.0
If we take 1935 away from 2280, we end up with 345.
Bring next digit (2) of the dividend behind the 345 and repeat the process: 3452 / 645

Let's proceed to step 6:
When dividing 3452 by 645, we get 5 with a remainder of 227.
The number 5 becomes the next digit in our result. 
Result so far: 235.0
If we subtract 3225 from 3452, we get 227.
Grab the next digit (9) from the dividend, add it to 227, then carry on: 2279 / 645

Moving on to step 7:
645 goes into 2279 3 times with a remainder of 344.
Put 3 as the next digit of the answer. 
Result so far: 2353.0
If we subtract 1935 from 2279, we get 344.
Fetch the next digit (4) from the dividend, attach it to 344 and continue: 3444 / 645

Going ahead to step 8:
When dividing 3444 by 645, we get 5 with a remainder of 219.
Write down 5 as next digit of the result. 
Result so far: 23535.0
Deduct 3225 from 3444 and we're left with 219.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2190, and continue the process.

Step 9:
The number 645 fits into 2190 3 times, leaving a remainder of 255.
The next digit of our result is 3. 
Result so far: 23535.3
If we take 1935 away from 2190, we end up with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Step 10:
2550 divided by 645 is 3 with a remainder of 615.
The number 3 becomes the next digit in our result. 
Result so far: 23535.33
The remainder is 615 after subtracting 1935 from 2550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6150, and continue the process.

The quotient of the division is 23535.33, and the remainder is 0.615.