21589699 divided by 855 
We're looking to find how many times 855 goes into 21589699.

Going ahead to step 1:
If we divide 2 by 855, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 855

Going ahead to step 2:
21 divided by 855 is 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Bring next digit (5) of the dividend behind the 21 and repeat the process: 215 / 855

Advancing to step 3:
When dividing 215 by 855, we get 0 with a remainder of 215.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 215 to get 215.
Grab the next digit (8) from the dividend, add it to 215, then carry on: 2158 / 855

Advancing to step 4:
If we divide 2158 by 855, we get 2 and a remainder of 448.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 448 after subtracting 1710 from 2158.
Fetch the next digit (9) from the dividend, attach it to 448 and continue: 4489 / 855

Let's proceed to step 5:
If we divide 4489 by 855, we get 5 and a remainder of 214.
Put 5 as the next digit of the answer. 
Result so far: 25.0
Subtracting 4275 from 4489 leaves us with 214.
Take the next digit (6) from the dividend and append it to 214, then repeat: 2146 / 855

On to step 6:
When dividing 2146 by 855, we get 2 with a remainder of 436.
Put 2 as the next digit of the answer. 
Result so far: 252.0
Deduct 1710 from 2146 and we're left with 436.
Append the next digit (9) from the dividend to 436 and continue with: 4369 / 855

Going ahead to step 7:
The number 855 fits into 4369 5 times, leaving a remainder of 94.
Write down 5 as next digit of the result. 
Result so far: 2525.0
Subtract 4275 from 4369 to get 94.
Fetch the next digit (9) from the dividend, attach it to 94 and continue: 949 / 855

Let's proceed to step 8:
855 can be fit into 949 1 times, resulting in a remainder of 94.
Record the quotient 1 as the next digit in the result. 
Result so far: 25251.0
Subtract 855 from 949 to get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Going ahead to step 9:
940 divided by 855 is 1 with a remainder of 85.
The number 1 becomes the next digit in our result. 
Result so far: 25251.1
Subtracting 855 from 940 leaves us with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Advancing to step 10:
855 goes into 850 0 times with a remainder of 850.
Use 0 as the next digit of our solution. 
Result so far: 25251.1
Deduct 0 from 850 and we're left with 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8500, and continue the process.

Step 11:
When dividing 8500 by 855, we get 9 with a remainder of 805.
The number 9 becomes the next digit in our result. 
Result so far: 25251.109
The remainder is 805 after subtracting 7695 from 8500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8050, and continue the process.

Going ahead to step 12:
8050 divided by 855 is 9 with a remainder of 355.
Put 9 as the next digit of the answer. 
Result so far: 25251.1099
The remainder is 355 after subtracting 7695 from 8050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

After the division, we end up with 25251.1099 and a remainder of 0.00355.