Let's divide 55515542 by 866
We want to divide 55515542 by 866.

Advancing to step 1:
The number 866 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 866

Step 2:
55 divided by 866 is 0 with a remainder of 55.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 55 after subtracting 0 from 55.
Bring next digit (5) of the dividend behind the 55 and repeat the process: 555 / 866

Let's proceed to step 3:
If we divide 555 by 866, we get 0 and a remainder of 555.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 555 after subtracting 0 from 555.
Grab the next digit (1) from the dividend, add it to 555, then carry on: 5551 / 866

Step 4:
When dividing 5551 by 866, we get 6 with a remainder of 355.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 355 after subtracting 5196 from 5551.
Take the next digit (5) from the dividend and append it to 355, then repeat: 3555 / 866

Step 5:
866 goes into 3555 4 times with a remainder of 91.
Record the quotient 4 as the next digit in the result. 
Result so far: 64.0
Subtracting 3464 from 3555 leaves us with 91.
Bring next digit (5) of the dividend behind the 91 and repeat the process: 915 / 866

Step 6:
The number 866 fits into 915 1 times, leaving a remainder of 49.
Write down 1 as next digit of the result. 
Result so far: 641.0
Deduct 866 from 915 and we're left with 49.
Grab the next digit (4) from the dividend, add it to 49, then carry on: 494 / 866

Let's proceed to step 7:
866 can be fit into 494 0 times, resulting in a remainder of 494.
Record the quotient 0 as the next digit in the result. 
Result so far: 6410.0
Subtracting 0 from 494 leaves us with 494.
Grab the next digit (2) from the dividend, add it to 494, then carry on: 4942 / 866

Step 8:
866 can be fit into 4942 5 times, resulting in a remainder of 612.
Write down 5 as next digit of the result. 
Result so far: 64105.0
Deduct 4330 from 4942 and we're left with 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

Moving on to step 9:
866 goes into 6120 7 times with a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 64105.7
Subtract 6062 from 6120 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 10:
If we divide 580 by 866, we get 0 and a remainder of 580.
The number 0 becomes the next digit in our result. 
Result so far: 64105.7
Deduct 0 from 580 and we're left with 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5800, and continue the process.

Moving on to step 11:
When dividing 5800 by 866, we get 6 with a remainder of 604.
The next digit of our result is 6. 
Result so far: 64105.706
Subtracting 5196 from 5800 leaves us with 604.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6040, and continue the process.

Let's proceed to step 12:
866 goes into 6040 6 times with a remainder of 844.
Use 6 as the next digit of our solution. 
Result so far: 64105.7066
Deduct 5196 from 6040 and we're left with 844.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8440, and continue the process.

After the division, we end up with 64105.7066 and a remainder of 0.00844.