Let's divide 66150589 by 866
We want to divide 66150589 by 866.

Advancing to step 1:
866 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 866

Advancing to step 2:
The number 866 fits into 66 0 times, leaving a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (1) from the dividend and append it to 66, then repeat: 661 / 866

On to step 3:
866 can be fit into 661 0 times, resulting in a remainder of 661.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 661, we get 661.
Bring next digit (5) of the dividend behind the 661 and repeat the process: 6615 / 866

On to step 4:
866 goes into 6615 7 times with a remainder of 553.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 553 after subtracting 6062 from 6615.
Include the next digit (0) from the dividend after 553, then repeat: 5530 / 866

Advancing to step 5:
The number 866 fits into 5530 6 times, leaving a remainder of 334.
The number 6 becomes the next digit in our result. 
Result so far: 76.0
Subtract 5196 from 5530 to get 334.
Append the next digit (5) from the dividend to 334 and continue with: 3345 / 866

Step 6:
If we divide 3345 by 866, we get 3 and a remainder of 747.
Use 3 as the next digit of our solution. 
Result so far: 763.0
Subtract 2598 from 3345 to get 747.
Append the next digit (8) from the dividend to 747 and continue with: 7478 / 866

Moving on to step 7:
If we divide 7478 by 866, we get 8 and a remainder of 550.
Put 8 as the next digit of the answer. 
Result so far: 7638.0
If we take 6928 away from 7478, we end up with 550.
Grab the next digit (9) from the dividend, add it to 550, then carry on: 5509 / 866

Let's proceed to step 8:
5509 divided by 866 is 6 with a remainder of 313.
The number 6 becomes the next digit in our result. 
Result so far: 76386.0
Deduct 5196 from 5509 and we're left with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Going ahead to step 9:
If we divide 3130 by 866, we get 3 and a remainder of 532.
The number 3 becomes the next digit in our result. 
Result so far: 76386.3
Subtracting 2598 from 3130 leaves us with 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

Moving on to step 10:
If we divide 5320 by 866, we get 6 and a remainder of 124.
The next digit of our result is 6. 
Result so far: 76386.36
Subtract 5196 from 5320 to get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Moving on to step 11:
The number 866 fits into 1240 1 times, leaving a remainder of 374.
Use 1 as the next digit of our solution. 
Result so far: 76386.361
If we take 866 away from 1240, we end up with 374.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3740, and continue the process.

Going ahead to step 12:
The number 866 fits into 3740 4 times, leaving a remainder of 276.
Use 4 as the next digit of our solution. 
Result so far: 76386.3614
Deduct 3464 from 3740 and we're left with 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Going ahead to step 13:
866 goes into 2760 3 times with a remainder of 162.
Record the quotient 3 as the next digit in the result. 
Result so far: 76386.36143
If we subtract 2598 from 2760, we get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Moving on to step 14:
If we divide 1620 by 866, we get 1 and a remainder of 754.
Put 1 as the next digit of the answer. 
Result so far: 76386.361431
Subtract 866 from 1620 to get 754.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7540, and continue the process.

Let's proceed to step 15:
866 goes into 7540 8 times with a remainder of 612.
Use 8 as the next digit of our solution. 
Result so far: 76386.3614318
Subtract 6928 from 7540 to get 612.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

Step 16:
6120 divided by 866 is 7 with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 76386.36143187
Deduct 6062 from 6120 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

The final outcome is 76386.36143187, with a leftover of 5.8e-08.