We're dividing 12148803 by 561 
We want to divide 12148803 by 561.

On to step 1:
The number 561 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 561

Advancing to step 2:
The number 561 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 561

Moving on to step 3:
When dividing 121 by 561, we get 0 with a remainder of 121.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 121 after subtracting 0 from 121.
Grab the next digit (4) from the dividend, add it to 121, then carry on: 1214 / 561

Moving on to step 4:
1214 divided by 561 is 2 with a remainder of 92.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 1122 away from 1214, we end up with 92.
Append the next digit (8) from the dividend to 92 and continue with: 928 / 561

On to step 5:
When dividing 928 by 561, we get 1 with a remainder of 367.
Put 1 as the next digit of the answer. 
Result so far: 21.0
Subtracting 561 from 928 leaves us with 367.
Grab the next digit (8) from the dividend, add it to 367, then carry on: 3678 / 561

Moving on to step 6:
561 goes into 3678 6 times with a remainder of 312.
Use 6 as the next digit of our solution. 
Result so far: 216.0
If we take 3366 away from 3678, we end up with 312.
Take the next digit (0) from the dividend and append it to 312, then repeat: 3120 / 561

Step 7:
561 can be fit into 3120 5 times, resulting in a remainder of 315.
Use 5 as the next digit of our solution. 
Result so far: 2165.0
If we subtract 2805 from 3120, we get 315.
Include the next digit (3) from the dividend after 315, then repeat: 3153 / 561

Going ahead to step 8:
When dividing 3153 by 561, we get 5 with a remainder of 348.
Record the quotient 5 as the next digit in the result. 
Result so far: 21655.0
Subtracting 2805 from 3153 leaves us with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Let's proceed to step 9:
3480 divided by 561 is 6 with a remainder of 114.
The number 6 becomes the next digit in our result. 
Result so far: 21655.6
The remainder is 114 after subtracting 3366 from 3480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Going ahead to step 10:
If we divide 1140 by 561, we get 2 and a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 21655.62
If we take 1122 away from 1140, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Step 11:
561 can be fit into 180 0 times, resulting in a remainder of 180.
Write down 0 as next digit of the result. 
Result so far: 21655.62
Subtracting 0 from 180 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Let's proceed to step 12:
561 goes into 1800 3 times with a remainder of 117.
The next digit of our result is 3. 
Result so far: 21655.6203
Subtract 1683 from 1800 to get 117.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1170, and continue the process.

Let's proceed to step 13:
561 goes into 1170 2 times with a remainder of 48.
Put 2 as the next digit of the answer. 
Result so far: 21655.62032
If we take 1122 away from 1170, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Step 14:
When dividing 480 by 561, we get 0 with a remainder of 480.
Record the quotient 0 as the next digit in the result. 
Result so far: 21655.62032
The remainder is 480 after subtracting 0 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 15:
If we divide 4800 by 561, we get 8 and a remainder of 312.
The number 8 becomes the next digit in our result. 
Result so far: 21655.6203208
If we take 4488 away from 4800, we end up with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Moving on to step 16:
561 goes into 3120 5 times with a remainder of 315.
Record the quotient 5 as the next digit in the result. 
Result so far: 21655.62032085
The remainder is 315 after subtracting 2805 from 3120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

The final outcome is 21655.62032085, with a leftover of 3.15e-07.