21400803 ÷ 877 
We want to divide 21400803 by 877.

Moving on to step 1:
When dividing 2 by 877, we get 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 877

Advancing to step 2:
The number 877 fits into 21 0 times, leaving a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Take the next digit (4) from the dividend and append it to 21, then repeat: 214 / 877

Advancing to step 3:
877 can be fit into 214 0 times, resulting in a remainder of 214.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 214 leaves us with 214.
Grab the next digit (0) from the dividend, add it to 214, then carry on: 2140 / 877

On to step 4:
877 can be fit into 2140 2 times, resulting in a remainder of 386.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 1754 from 2140 to get 386.
Grab the next digit (0) from the dividend, add it to 386, then carry on: 3860 / 877

Going ahead to step 5:
The number 877 fits into 3860 4 times, leaving a remainder of 352.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
If we subtract 3508 from 3860, we get 352.
Include the next digit (8) from the dividend after 352, then repeat: 3528 / 877

Let's proceed to step 6:
877 can be fit into 3528 4 times, resulting in a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 244.0
Deduct 3508 from 3528 and we're left with 20.
Grab the next digit (0) from the dividend, add it to 20, then carry on: 200 / 877

Advancing to step 7:
When dividing 200 by 877, we get 0 with a remainder of 200.
The next digit of our result is 0. 
Result so far: 2440.0
If we subtract 0 from 200, we get 200.
Bring next digit (3) of the dividend behind the 200 and repeat the process: 2003 / 877

On to step 8:
The number 877 fits into 2003 2 times, leaving a remainder of 249.
Use 2 as the next digit of our solution. 
Result so far: 24402.0
The remainder is 249 after subtracting 1754 from 2003.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Step 9:
2490 divided by 877 is 2 with a remainder of 736.
Put 2 as the next digit of the answer. 
Result so far: 24402.2
Subtract 1754 from 2490 to get 736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

Going ahead to step 10:
7360 divided by 877 is 8 with a remainder of 344.
Put 8 as the next digit of the answer. 
Result so far: 24402.28
The remainder is 344 after subtracting 7016 from 7360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

Let's proceed to step 11:
3440 divided by 877 is 3 with a remainder of 809.
Use 3 as the next digit of our solution. 
Result so far: 24402.283
Subtract 2631 from 3440 to get 809.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8090, and continue the process.

Advancing to step 12:
877 can be fit into 8090 9 times, resulting in a remainder of 197.
The number 9 becomes the next digit in our result. 
Result so far: 24402.2839
If we take 7893 away from 8090, we end up with 197.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1970, and continue the process.

On to step 13:
If we divide 1970 by 877, we get 2 and a remainder of 216.
Record the quotient 2 as the next digit in the result. 
Result so far: 24402.28392
Subtract 1754 from 1970 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Going ahead to step 14:
If we divide 2160 by 877, we get 2 and a remainder of 406.
Use 2 as the next digit of our solution. 
Result so far: 24402.283922
The remainder is 406 after subtracting 1754 from 2160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

The final result is 24402.283922 with a remainder of 4.06e-05.