86257945 ÷ 91 
We want to divide 86257945 by 91.

Let's proceed to step 1:
91 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 91

Going ahead to step 2:
If we divide 86 by 91, we get 0 and a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Fetch the next digit (2) from the dividend, attach it to 86 and continue: 862 / 91

Moving on to step 3:
862 divided by 91 is 9 with a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 819 from 862, we get 43.
Grab the next digit (5) from the dividend, add it to 43, then carry on: 435 / 91

Let's proceed to step 4:
The number 91 fits into 435 4 times, leaving a remainder of 71.
Write down 4 as next digit of the result. 
Result so far: 94.0
If we subtract 364 from 435, we get 71.
Fetch the next digit (7) from the dividend, attach it to 71 and continue: 717 / 91

Advancing to step 5:
91 goes into 717 7 times with a remainder of 80.
Record the quotient 7 as the next digit in the result. 
Result so far: 947.0
The remainder is 80 after subtracting 637 from 717.
Take the next digit (9) from the dividend and append it to 80, then repeat: 809 / 91

Advancing to step 6:
91 goes into 809 8 times with a remainder of 81.
Record the quotient 8 as the next digit in the result. 
Result so far: 9478.0
If we take 728 away from 809, we end up with 81.
Append the next digit (4) from the dividend to 81 and continue with: 814 / 91

Advancing to step 7:
The number 91 fits into 814 8 times, leaving a remainder of 86.
Record the quotient 8 as the next digit in the result. 
Result so far: 94788.0
Subtract 728 from 814 to get 86.
Bring next digit (5) of the dividend behind the 86 and repeat the process: 865 / 91

Let's proceed to step 8:
If we divide 865 by 91, we get 9 and a remainder of 46.
Write down 9 as next digit of the result. 
Result so far: 947889.0
Subtract 819 from 865 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 9:
460 divided by 91 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 947889.5
Subtracting 455 from 460 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 10:
When dividing 50 by 91, we get 0 with a remainder of 50.
Use 0 as the next digit of our solution. 
Result so far: 947889.5
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 11:
91 can be fit into 500 5 times, resulting in a remainder of 45.
The next digit of our result is 5. 
Result so far: 947889.505
If we take 455 away from 500, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 12:
When dividing 450 by 91, we get 4 with a remainder of 86.
Use 4 as the next digit of our solution. 
Result so far: 947889.5054
Deduct 364 from 450 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Going ahead to step 13:
If we divide 860 by 91, we get 9 and a remainder of 41.
Record the quotient 9 as the next digit in the result. 
Result so far: 947889.50549
Deduct 819 from 860 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Advancing to step 14:
The number 91 fits into 410 4 times, leaving a remainder of 46.
The number 4 becomes the next digit in our result. 
Result so far: 947889.505494
Subtract 364 from 410 to get 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Let's proceed to step 15:
When dividing 460 by 91, we get 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 947889.5054945
Subtracting 455 from 460 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 16:
When dividing 50 by 91, we get 0 with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 947889.5054945
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 947889.5054945 with a remaining 5e-08.