Let's divide 42106478 by 866
We want to divide 42106478 by 866.

Moving on to step 1:
866 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 866

Step 2:
If we divide 42 by 866, we get 0 and a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Include the next digit (1) from the dividend after 42, then repeat: 421 / 866

Moving on to step 3:
421 divided by 866 is 0 with a remainder of 421.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 421 leaves us with 421.
Take the next digit (0) from the dividend and append it to 421, then repeat: 4210 / 866

Moving on to step 4:
866 can be fit into 4210 4 times, resulting in a remainder of 746.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 3464 away from 4210, we end up with 746.
Take the next digit (6) from the dividend and append it to 746, then repeat: 7466 / 866

Advancing to step 5:
7466 divided by 866 is 8 with a remainder of 538.
The number 8 becomes the next digit in our result. 
Result so far: 48.0
If we take 6928 away from 7466, we end up with 538.
Append the next digit (4) from the dividend to 538 and continue with: 5384 / 866

Advancing to step 6:
If we divide 5384 by 866, we get 6 and a remainder of 188.
Write down 6 as next digit of the result. 
Result so far: 486.0
Subtract 5196 from 5384 to get 188.
Bring next digit (7) of the dividend behind the 188 and repeat the process: 1887 / 866

Advancing to step 7:
When dividing 1887 by 866, we get 2 with a remainder of 155.
Use 2 as the next digit of our solution. 
Result so far: 4862.0
If we take 1732 away from 1887, we end up with 155.
Fetch the next digit (8) from the dividend, attach it to 155 and continue: 1558 / 866

Going ahead to step 8:
The number 866 fits into 1558 1 times, leaving a remainder of 692.
Record the quotient 1 as the next digit in the result. 
Result so far: 48621.0
If we subtract 866 from 1558, we get 692.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6920, and continue the process.

On to step 9:
When dividing 6920 by 866, we get 7 with a remainder of 858.
Write down 7 as next digit of the result. 
Result so far: 48621.7
Subtract 6062 from 6920 to get 858.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8580, and continue the process.

Step 10:
When dividing 8580 by 866, we get 9 with a remainder of 786.
Record the quotient 9 as the next digit in the result. 
Result so far: 48621.79
Deduct 7794 from 8580 and we're left with 786.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7860, and continue the process.

Step 11:
When dividing 7860 by 866, we get 9 with a remainder of 66.
Put 9 as the next digit of the answer. 
Result so far: 48621.799
Subtracting 7794 from 7860 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

In conclusion, the division gives 48621.799 with a balance of 0.0066.