We look at the division of 30661578 by 866 
Let's see how many times 866 fits into 30661578.

Step 1:
3 divided by 866 is 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 866

Advancing to step 2:
866 can be fit into 30 0 times, resulting in a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 30 to get 30.
Bring next digit (6) of the dividend behind the 30 and repeat the process: 306 / 866

Advancing to step 3:
306 divided by 866 is 0 with a remainder of 306.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 306 and we're left with 306.
Include the next digit (6) from the dividend after 306, then repeat: 3066 / 866

On to step 4:
When dividing 3066 by 866, we get 3 with a remainder of 468.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 2598 from 3066 leaves us with 468.
Grab the next digit (1) from the dividend, add it to 468, then carry on: 4681 / 866

Moving on to step 5:
When dividing 4681 by 866, we get 5 with a remainder of 351.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
The remainder is 351 after subtracting 4330 from 4681.
Include the next digit (5) from the dividend after 351, then repeat: 3515 / 866

Let's proceed to step 6:
If we divide 3515 by 866, we get 4 and a remainder of 51.
Write down 4 as next digit of the result. 
Result so far: 354.0
If we subtract 3464 from 3515, we get 51.
Fetch the next digit (7) from the dividend, attach it to 51 and continue: 517 / 866

Let's proceed to step 7:
If we divide 517 by 866, we get 0 and a remainder of 517.
Use 0 as the next digit of our solution. 
Result so far: 3540.0
If we subtract 0 from 517, we get 517.
Take the next digit (8) from the dividend and append it to 517, then repeat: 5178 / 866

On to step 8:
866 goes into 5178 5 times with a remainder of 848.
The number 5 becomes the next digit in our result. 
Result so far: 35405.0
If we subtract 4330 from 5178, we get 848.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8480, and continue the process.

Moving on to step 9:
866 goes into 8480 9 times with a remainder of 686.
Put 9 as the next digit of the answer. 
Result so far: 35405.9
Deduct 7794 from 8480 and we're left with 686.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6860, and continue the process.

Step 10:
If we divide 6860 by 866, we get 7 and a remainder of 798.
Write down 7 as next digit of the result. 
Result so far: 35405.97
Subtract 6062 from 6860 to get 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

Going ahead to step 11:
866 can be fit into 7980 9 times, resulting in a remainder of 186.
The number 9 becomes the next digit in our result. 
Result so far: 35405.979
The remainder is 186 after subtracting 7794 from 7980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Moving on to step 12:
The number 866 fits into 1860 2 times, leaving a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 35405.9792
If we take 1732 away from 1860, we end up with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Moving on to step 13:
When dividing 1280 by 866, we get 1 with a remainder of 414.
Use 1 as the next digit of our solution. 
Result so far: 35405.97921
Deduct 866 from 1280 and we're left with 414.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4140, and continue the process.

Going ahead to step 14:
When dividing 4140 by 866, we get 4 with a remainder of 676.
Write down 4 as next digit of the result. 
Result so far: 35405.979214
The remainder is 676 after subtracting 3464 from 4140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Going ahead to step 15:
866 can be fit into 6760 7 times, resulting in a remainder of 698.
Put 7 as the next digit of the answer. 
Result so far: 35405.9792147
Subtracting 6062 from 6760 leaves us with 698.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6980, and continue the process.

Advancing to step 16:
866 can be fit into 6980 8 times, resulting in a remainder of 52.
Use 8 as the next digit of our solution. 
Result so far: 35405.97921478
The remainder is 52 after subtracting 6928 from 6980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 35405.97921478, with a leftover of 5.2e-08.