We divide 21365642 by 878
We want to figure out the number of times 21365642 can be divided by 878.

Going ahead to step 1:
The number 878 fits into 2 0 times, leaving a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 878

Moving on to step 2:
If we divide 21 by 878, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Append the next digit (3) from the dividend to 21 and continue with: 213 / 878

Step 3:
213 divided by 878 is 0 with a remainder of 213.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 213 to get 213.
Bring next digit (6) of the dividend behind the 213 and repeat the process: 2136 / 878

Moving on to step 4:
The number 878 fits into 2136 2 times, leaving a remainder of 380.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 1756 from 2136, we get 380.
Include the next digit (5) from the dividend after 380, then repeat: 3805 / 878

Step 5:
When dividing 3805 by 878, we get 4 with a remainder of 293.
The next digit of our result is 4. 
Result so far: 24.0
Subtracting 3512 from 3805 leaves us with 293.
Grab the next digit (6) from the dividend, add it to 293, then carry on: 2936 / 878

Going ahead to step 6:
878 can be fit into 2936 3 times, resulting in a remainder of 302.
Write down 3 as next digit of the result. 
Result so far: 243.0
Deduct 2634 from 2936 and we're left with 302.
Bring next digit (4) of the dividend behind the 302 and repeat the process: 3024 / 878

Let's proceed to step 7:
878 can be fit into 3024 3 times, resulting in a remainder of 390.
The number 3 becomes the next digit in our result. 
Result so far: 2433.0
Subtracting 2634 from 3024 leaves us with 390.
Take the next digit (2) from the dividend and append it to 390, then repeat: 3902 / 878

Advancing to step 8:
If we divide 3902 by 878, we get 4 and a remainder of 390.
Use 4 as the next digit of our solution. 
Result so far: 24334.0
If we take 3512 away from 3902, we end up with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Going ahead to step 9:
878 can be fit into 3900 4 times, resulting in a remainder of 388.
Put 4 as the next digit of the answer. 
Result so far: 24334.4
Deduct 3512 from 3900 and we're left with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Going ahead to step 10:
When dividing 3880 by 878, we get 4 with a remainder of 368.
Put 4 as the next digit of the answer. 
Result so far: 24334.44
Subtracting 3512 from 3880 leaves us with 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

The quotient of the division is 24334.44, and the remainder is 0.368.