81712287 ÷ 807 
Let's see how many times 807 fits into 81712287.

Going ahead to step 1:
When dividing 8 by 807, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 807

Let's proceed to step 2:
When dividing 81 by 807, we get 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Fetch the next digit (7) from the dividend, attach it to 81 and continue: 817 / 807

Let's proceed to step 3:
807 can be fit into 817 1 times, resulting in a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 10 after subtracting 807 from 817.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 807

Step 4:
101 divided by 807 is 0 with a remainder of 101.
Write down 0 as next digit of the result. 
Result so far: 10.0
The remainder is 101 after subtracting 0 from 101.
Include the next digit (2) from the dividend after 101, then repeat: 1012 / 807

On to step 5:
The number 807 fits into 1012 1 times, leaving a remainder of 205.
Write down 1 as next digit of the result. 
Result so far: 101.0
Deduct 807 from 1012 and we're left with 205.
Append the next digit (2) from the dividend to 205 and continue with: 2052 / 807

On to step 6:
807 goes into 2052 2 times with a remainder of 438.
Write down 2 as next digit of the result. 
Result so far: 1012.0
The remainder is 438 after subtracting 1614 from 2052.
Include the next digit (8) from the dividend after 438, then repeat: 4388 / 807

On to step 7:
If we divide 4388 by 807, we get 5 and a remainder of 353.
Write down 5 as next digit of the result. 
Result so far: 10125.0
Subtract 4035 from 4388 to get 353.
Fetch the next digit (7) from the dividend, attach it to 353 and continue: 3537 / 807

Moving on to step 8:
807 goes into 3537 4 times with a remainder of 309.
Record the quotient 4 as the next digit in the result. 
Result so far: 101254.0
Subtracting 3228 from 3537 leaves us with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Advancing to step 9:
The number 807 fits into 3090 3 times, leaving a remainder of 669.
Use 3 as the next digit of our solution. 
Result so far: 101254.3
Subtracting 2421 from 3090 leaves us with 669.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6690, and continue the process.

Going ahead to step 10:
If we divide 6690 by 807, we get 8 and a remainder of 234.
Put 8 as the next digit of the answer. 
Result so far: 101254.38
The remainder is 234 after subtracting 6456 from 6690.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Step 11:
The number 807 fits into 2340 2 times, leaving a remainder of 726.
The number 2 becomes the next digit in our result. 
Result so far: 101254.382
If we take 1614 away from 2340, we end up with 726.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7260, and continue the process.

On to step 12:
If we divide 7260 by 807, we get 8 and a remainder of 804.
Put 8 as the next digit of the answer. 
Result so far: 101254.3828
Subtracting 6456 from 7260 leaves us with 804.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8040, and continue the process.

Step 13:
The number 807 fits into 8040 9 times, leaving a remainder of 777.
Record the quotient 9 as the next digit in the result. 
Result so far: 101254.38289
Subtracting 7263 from 8040 leaves us with 777.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7770, and continue the process.

Step 14:
807 can be fit into 7770 9 times, resulting in a remainder of 507.
Put 9 as the next digit of the answer. 
Result so far: 101254.382899
Subtract 7263 from 7770 to get 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

After the division, we end up with 101254.382899 and a remainder of 5.07e-05.