21186486 divided by 987 
Let's see how many times 987 fits into 21186486.

Advancing to step 1:
If we divide 2 by 987, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 987

Advancing to step 2:
21 divided by 987 is 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Bring next digit (1) of the dividend behind the 21 and repeat the process: 211 / 987

Moving on to step 3:
987 goes into 211 0 times with a remainder of 211.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 211, we end up with 211.
Take the next digit (8) from the dividend and append it to 211, then repeat: 2118 / 987

Moving on to step 4:
The number 987 fits into 2118 2 times, leaving a remainder of 144.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1974 from 2118 to get 144.
Fetch the next digit (6) from the dividend, attach it to 144 and continue: 1446 / 987

Step 5:
The number 987 fits into 1446 1 times, leaving a remainder of 459.
Write down 1 as next digit of the result. 
Result so far: 21.0
If we subtract 987 from 1446, we get 459.
Take the next digit (4) from the dividend and append it to 459, then repeat: 4594 / 987

Let's proceed to step 6:
987 can be fit into 4594 4 times, resulting in a remainder of 646.
The number 4 becomes the next digit in our result. 
Result so far: 214.0
Subtract 3948 from 4594 to get 646.
Take the next digit (8) from the dividend and append it to 646, then repeat: 6468 / 987

Let's proceed to step 7:
987 goes into 6468 6 times with a remainder of 546.
Write down 6 as next digit of the result. 
Result so far: 2146.0
Subtract 5922 from 6468 to get 546.
Grab the next digit (6) from the dividend, add it to 546, then carry on: 5466 / 987

On to step 8:
When dividing 5466 by 987, we get 5 with a remainder of 531.
The next digit of our result is 5. 
Result so far: 21465.0
Subtracting 4935 from 5466 leaves us with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

On to step 9:
987 goes into 5310 5 times with a remainder of 375.
Use 5 as the next digit of our solution. 
Result so far: 21465.5
Deduct 4935 from 5310 and we're left with 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Step 10:
3750 divided by 987 is 3 with a remainder of 789.
Record the quotient 3 as the next digit in the result. 
Result so far: 21465.53
The remainder is 789 after subtracting 2961 from 3750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7890, and continue the process.

Let's proceed to step 11:
When dividing 7890 by 987, we get 7 with a remainder of 981.
The number 7 becomes the next digit in our result. 
Result so far: 21465.537
Subtract 6909 from 7890 to get 981.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9810, and continue the process.

Advancing to step 12:
987 can be fit into 9810 9 times, resulting in a remainder of 927.
Put 9 as the next digit of the answer. 
Result so far: 21465.5379
The remainder is 927 after subtracting 8883 from 9810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9270, and continue the process.

Step 13:
When dividing 9270 by 987, we get 9 with a remainder of 387.
Record the quotient 9 as the next digit in the result. 
Result so far: 21465.53799
Deduct 8883 from 9270 and we're left with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

In conclusion, the division gives 21465.53799 with a balance of 0.000387.