87138559 ÷ 891 
Our goal is to divide 87138559 by 891.

On to step 1:
If we divide 8 by 891, we get 0 and a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 891

Moving on to step 2:
891 goes into 87 0 times 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.
Take the next digit (1) from the dividend and append it to 87, then repeat: 871 / 891

Going ahead to step 3:
When dividing 871 by 891, we get 0 with a remainder of 871.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 871, we get 871.
Include the next digit (3) from the dividend after 871, then repeat: 8713 / 891

Advancing to step 4:
The number 891 fits into 8713 9 times, leaving a remainder of 694.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 8019 from 8713 and we're left with 694.
Bring next digit (8) of the dividend behind the 694 and repeat the process: 6948 / 891

On to step 5:
If we divide 6948 by 891, we get 7 and a remainder of 711.
Put 7 as the next digit of the answer. 
Result so far: 97.0
Deduct 6237 from 6948 and we're left with 711.
Grab the next digit (5) from the dividend, add it to 711, then carry on: 7115 / 891

Step 6:
891 can be fit into 7115 7 times, resulting in a remainder of 878.
Write down 7 as next digit of the result. 
Result so far: 977.0
If we take 6237 away from 7115, we end up with 878.
Fetch the next digit (5) from the dividend, attach it to 878 and continue: 8785 / 891

Step 7:
891 can be fit into 8785 9 times, resulting in a remainder of 766.
Use 9 as the next digit of our solution. 
Result so far: 9779.0
Subtract 8019 from 8785 to get 766.
Include the next digit (9) from the dividend after 766, then repeat: 7669 / 891

Going ahead to step 8:
891 can be fit into 7669 8 times, resulting in a remainder of 541.
Record the quotient 8 as the next digit in the result. 
Result so far: 97798.0
Subtracting 7128 from 7669 leaves us with 541.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5410, and continue the process.

Step 9:
5410 divided by 891 is 6 with a remainder of 64.
Write down 6 as next digit of the result. 
Result so far: 97798.6
If we subtract 5346 from 5410, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 10:
640 divided by 891 is 0 with a remainder of 640.
The number 0 becomes the next digit in our result. 
Result so far: 97798.6
If we subtract 0 from 640, we get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

On to step 11:
If we divide 6400 by 891, we get 7 and a remainder of 163.
The number 7 becomes the next digit in our result. 
Result so far: 97798.607
Subtracting 6237 from 6400 leaves us with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Step 12:
891 can be fit into 1630 1 times, resulting in a remainder of 739.
Record the quotient 1 as the next digit in the result. 
Result so far: 97798.6071
If we subtract 891 from 1630, we get 739.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7390, and continue the process.

On to step 13:
891 can be fit into 7390 8 times, resulting in a remainder of 262.
The number 8 becomes the next digit in our result. 
Result so far: 97798.60718
The remainder is 262 after subtracting 7128 from 7390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Step 14:
891 goes into 2620 2 times with a remainder of 838.
The next digit of our result is 2. 
Result so far: 97798.607182
If we subtract 1782 from 2620, we get 838.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8380, and continue the process.

Advancing to step 15:
891 can be fit into 8380 9 times, resulting in a remainder of 361.
The next digit of our result is 9. 
Result so far: 97798.6071829
Subtract 8019 from 8380 to get 361.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3610, and continue the process.

Going ahead to step 16:
891 goes into 3610 4 times with a remainder of 46.
Record the quotient 4 as the next digit in the result. 
Result so far: 97798.60718294
Deduct 3564 from 3610 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

The quotient of the division is 97798.60718294, and the remainder is 4.6e-08.