66443506 ÷ 86 
Let's see how many times 86 fits into 66443506.

Going ahead to step 1:
The number 86 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 86

Going ahead to step 2:
If we divide 66 by 86, we get 0 and a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Append the next digit (4) from the dividend to 66 and continue with: 664 / 86

Step 3:
86 can be fit into 664 7 times, resulting in a remainder of 62.
Write down 7 as next digit of the result. 
Result so far: 7.0
Subtracting 602 from 664 leaves us with 62.
Append the next digit (4) from the dividend to 62 and continue with: 624 / 86

On to step 4:
If we divide 624 by 86, we get 7 and a remainder of 22.
The next digit of our result is 7. 
Result so far: 77.0
If we subtract 602 from 624, we get 22.
Append the next digit (3) from the dividend to 22 and continue with: 223 / 86

On to step 5:
The number 86 fits into 223 2 times, leaving a remainder of 51.
Record the quotient 2 as the next digit in the result. 
Result so far: 772.0
If we subtract 172 from 223, we get 51.
Grab the next digit (5) from the dividend, add it to 51, then carry on: 515 / 86

Going ahead to step 6:
86 goes into 515 5 times with a remainder of 85.
Use 5 as the next digit of our solution. 
Result so far: 7725.0
If we take 430 away from 515, we end up with 85.
Include the next digit (0) from the dividend after 85, then repeat: 850 / 86

Advancing to step 7:
The number 86 fits into 850 9 times, leaving a remainder of 76.
The number 9 becomes the next digit in our result. 
Result so far: 77259.0
If we take 774 away from 850, we end up with 76.
Bring next digit (6) of the dividend behind the 76 and repeat the process: 766 / 86

On to step 8:
86 can be fit into 766 8 times, resulting in a remainder of 78.
Put 8 as the next digit of the answer. 
Result so far: 772598.0
Subtracting 688 from 766 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Going ahead to step 9:
780 divided by 86 is 9 with a remainder of 6.
Use 9 as the next digit of our solution. 
Result so far: 772598.9
If we subtract 774 from 780, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 10:
The number 86 fits into 60 0 times, leaving a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 772598.9
If we subtract 0 from 60, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 11:
600 divided by 86 is 6 with a remainder of 84.
Use 6 as the next digit of our solution. 
Result so far: 772598.906
Deduct 516 from 600 and we're left with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 12:
86 can be fit into 840 9 times, resulting in a remainder of 66.
The next digit of our result is 9. 
Result so far: 772598.9069
Subtract 774 from 840 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Let's proceed to step 13:
660 divided by 86 is 7 with a remainder of 58.
Record the quotient 7 as the next digit in the result. 
Result so far: 772598.90697
Subtract 602 from 660 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 14:
The number 86 fits into 580 6 times, leaving a remainder of 64.
The next digit of our result is 6. 
Result so far: 772598.906976
Deduct 516 from 580 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Let's proceed to step 15:
640 divided by 86 is 7 with a remainder of 38.
The next digit of our result is 7. 
Result so far: 772598.9069767
If we take 602 away from 640, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 16:
380 divided by 86 is 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 772598.90697674
Subtract 344 from 380 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Our division results in 772598.90697674 with a remaining 3.6e-08.