Let's divide 870486 by 91
Our goal is to divide 870486 by 91.

Advancing to step 1:
8 divided by 91 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 91

Going ahead to step 2:
When dividing 87 by 91, we get 0 with a remainder of 87.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 87 after subtracting 0 from 87.
Include the next digit (0) from the dividend after 87, then repeat: 870 / 91

Advancing to step 3:
If we divide 870 by 91, we get 9 and a remainder of 51.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 819 away from 870, we end up with 51.
Fetch the next digit (4) from the dividend, attach it to 51 and continue: 514 / 91

On to step 4:
If we divide 514 by 91, we get 5 and a remainder of 59.
Write down 5 as next digit of the result. 
Result so far: 95.0
If we take 455 away from 514, we end up with 59.
Grab the next digit (8) from the dividend, add it to 59, then carry on: 598 / 91

Let's proceed to step 5:
When dividing 598 by 91, we get 6 with a remainder of 52.
The number 6 becomes the next digit in our result. 
Result so far: 956.0
If we subtract 546 from 598, we get 52.
Include the next digit (6) from the dividend after 52, then repeat: 526 / 91

Moving on to step 6:
526 divided by 91 is 5 with a remainder of 71.
Put 5 as the next digit of the answer. 
Result so far: 9565.0
Subtract 455 from 526 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 7:
If we divide 710 by 91, we get 7 and a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 9565.7
Subtracting 637 from 710 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Let's proceed to step 8:
91 can be fit into 730 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 9565.78
Subtract 728 from 730 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 9:
91 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 9565.78
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 10:
91 can be fit into 200 2 times, resulting in a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 9565.7802
Subtract 182 from 200 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 11:
180 divided by 91 is 1 with a remainder of 89.
Put 1 as the next digit of the answer. 
Result so far: 9565.78021
Subtracting 91 from 180 leaves us with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

On to step 12:
When dividing 890 by 91, we get 9 with a remainder of 71.
Record the quotient 9 as the next digit in the result. 
Result so far: 9565.780219
If we take 819 away from 890, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Let's proceed to step 13:
The number 91 fits into 710 7 times, leaving a remainder of 73.
Use 7 as the next digit of our solution. 
Result so far: 9565.7802197
The remainder is 73 after subtracting 637 from 710.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 14:
If we divide 730 by 91, we get 8 and a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 9565.78021978
Subtract 728 from 730 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 9565.78021978 with a remainder of 2e-09.