We're dividing 86290585 by 91 
We want to divide 86290585 by 91.

On to step 1:
If we divide 8 by 91, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 91

Moving on to step 2:
91 can be fit into 86 0 times, resulting in a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Append the next digit (2) from the dividend to 86 and continue with: 862 / 91

Let's proceed to step 3:
When dividing 862 by 91, we get 9 with a remainder of 43.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 819 from 862 and we're left with 43.
Append the next digit (9) from the dividend to 43 and continue with: 439 / 91

Advancing to step 4:
91 goes into 439 4 times with a remainder of 75.
The next digit of our result is 4. 
Result so far: 94.0
If we take 364 away from 439, we end up with 75.
Take the next digit (0) from the dividend and append it to 75, then repeat: 750 / 91

Advancing to step 5:
750 divided by 91 is 8 with a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 948.0
Deduct 728 from 750 and we're left with 22.
Bring next digit (5) of the dividend behind the 22 and repeat the process: 225 / 91

On to step 6:
91 goes into 225 2 times with a remainder of 43.
Record the quotient 2 as the next digit in the result. 
Result so far: 9482.0
Subtracting 182 from 225 leaves us with 43.
Bring next digit (8) of the dividend behind the 43 and repeat the process: 438 / 91

Moving on to step 7:
If we divide 438 by 91, we get 4 and a remainder of 74.
The next digit of our result is 4. 
Result so far: 94824.0
Deduct 364 from 438 and we're left with 74.
Grab the next digit (5) from the dividend, add it to 74, then carry on: 745 / 91

On to step 8:
745 divided by 91 is 8 with a remainder of 17.
The number 8 becomes the next digit in our result. 
Result so far: 948248.0
If we subtract 728 from 745, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 9:
170 divided by 91 is 1 with a remainder of 79.
Write down 1 as next digit of the result. 
Result so far: 948248.1
If we take 91 away from 170, we end up with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Let's proceed to step 10:
790 divided by 91 is 8 with a remainder of 62.
The next digit of our result is 8. 
Result so far: 948248.18
The remainder is 62 after subtracting 728 from 790.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Moving on to step 11:
620 divided by 91 is 6 with a remainder of 74.
The next digit of our result is 6. 
Result so far: 948248.186
Deduct 546 from 620 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 12:
91 goes into 740 8 times with a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 948248.1868
Subtracting 728 from 740 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 13:
120 divided by 91 is 1 with a remainder of 29.
Record the quotient 1 as the next digit in the result. 
Result so far: 948248.18681
Deduct 91 from 120 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 14:
If we divide 290 by 91, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 948248.186813
Deduct 273 from 290 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 15:
The number 91 fits into 170 1 times, leaving a remainder of 79.
The next digit of our result is 1. 
Result so far: 948248.1868131
If we subtract 91 from 170, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Moving on to step 16:
790 divided by 91 is 8 with a remainder of 62.
Use 8 as the next digit of our solution. 
Result so far: 948248.18681318
If we take 728 away from 790, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

In conclusion, the division gives 948248.18681318 with a balance of 6.2e-08.