87880820 ÷ 21 
Our goal is to divide 87880820 by 21.

Let's proceed to step 1:
21 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 21

On to step 2:
When dividing 87 by 21, we get 4 with a remainder of 3.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 84 from 87 leaves us with 3.
Bring next digit (8) of the dividend behind the 3 and repeat the process: 38 / 21

Moving on to step 3:
21 can be fit into 38 1 times, resulting in a remainder of 17.
Record the quotient 1 as the next digit in the result. 
Result so far: 41.0
The remainder is 17 after subtracting 21 from 38.
Bring next digit (8) of the dividend behind the 17 and repeat the process: 178 / 21

Moving on to step 4:
21 can be fit into 178 8 times, resulting in a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 418.0
Deduct 168 from 178 and we're left with 10.
Bring next digit (0) of the dividend behind the 10 and repeat the process: 100 / 21

Going ahead to step 5:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 4184.0
Subtracting 84 from 100 leaves us with 16.
Take the next digit (8) from the dividend and append it to 16, then repeat: 168 / 21

Advancing to step 6:
The number 21 fits into 168 8 times, leaving a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 41848.0
Subtracting 168 from 168 leaves us with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 21

On to step 7:
2 divided by 21 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 418480.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 21

Step 8:
When dividing 20 by 21, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 4184800.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 4184800.9
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 10:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 4184800.95
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 11:
50 divided by 21 is 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 4184800.952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 12:
80 divided by 21 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 4184800.9523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 13:
170 divided by 21 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 4184800.95238
If we take 168 away from 170, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 14:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 4184800.95238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 15:
When dividing 200 by 21, we get 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 4184800.9523809
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 16:
When dividing 110 by 21, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 4184800.95238095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The quotient of the division is 4184800.95238095, and the remainder is 5e-09.