We look at the division of 21687917 by 835 
We're looking to find how many times 835 goes into 21687917.

On to step 1:
2 divided by 835 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 835

Moving on to step 2:
When dividing 21 by 835, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Bring next digit (6) of the dividend behind the 21 and repeat the process: 216 / 835

Going ahead to step 3:
If we divide 216 by 835, we get 0 and a remainder of 216.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 216 and we're left with 216.
Append the next digit (8) from the dividend to 216 and continue with: 2168 / 835

Step 4:
The number 835 fits into 2168 2 times, leaving a remainder of 498.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 1670 from 2168 and we're left with 498.
Fetch the next digit (7) from the dividend, attach it to 498 and continue: 4987 / 835

Moving on to step 5:
When dividing 4987 by 835, we get 5 with a remainder of 812.
Write down 5 as next digit of the result. 
Result so far: 25.0
If we subtract 4175 from 4987, we get 812.
Include the next digit (9) from the dividend after 812, then repeat: 8129 / 835

On to step 6:
The number 835 fits into 8129 9 times, leaving a remainder of 614.
The number 9 becomes the next digit in our result. 
Result so far: 259.0
Deduct 7515 from 8129 and we're left with 614.
Fetch the next digit (1) from the dividend, attach it to 614 and continue: 6141 / 835

Going ahead to step 7:
If we divide 6141 by 835, we get 7 and a remainder of 296.
The number 7 becomes the next digit in our result. 
Result so far: 2597.0
Deduct 5845 from 6141 and we're left with 296.
Fetch the next digit (7) from the dividend, attach it to 296 and continue: 2967 / 835

Step 8:
835 goes into 2967 3 times with a remainder of 462.
Use 3 as the next digit of our solution. 
Result so far: 25973.0
Subtracting 2505 from 2967 leaves us with 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Advancing to step 9:
The number 835 fits into 4620 5 times, leaving a remainder of 445.
The number 5 becomes the next digit in our result. 
Result so far: 25973.5
Subtract 4175 from 4620 to get 445.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Advancing to step 10:
835 can be fit into 4450 5 times, resulting in a remainder of 275.
Record the quotient 5 as the next digit in the result. 
Result so far: 25973.55
The remainder is 275 after subtracting 4175 from 4450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

The final result is 25973.55 with a remainder of 0.275.