98788279 ÷ 21 
We want to figure out the number of times 98788279 can be divided by 21.

Let's proceed to step 1:
When dividing 9 by 21, we get 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 21

Moving on to step 2:
When dividing 98 by 21, we get 4 with a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 84 from 98, we get 14.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 21

Moving on to step 3:
21 can be fit into 147 7 times, resulting in a remainder of 0.
The next digit of our result is 7. 
Result so far: 47.0
Subtracting 147 from 147 leaves us with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 21

Going ahead to step 4:
8 divided by 21 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 470.0
If we take 0 away from 8, we end up with 8.
Bring next digit (8) of the dividend behind the 8 and repeat the process: 88 / 21

Going ahead to step 5:
21 can be fit into 88 4 times, resulting in a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 4704.0
Subtract 84 from 88 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 21

Let's proceed to step 6:
The number 21 fits into 42 2 times, leaving a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 47042.0
Subtracting 42 from 42 leaves us with 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 21

Moving on to step 7:
21 goes into 7 0 times with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 470420.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 21

Advancing to step 8:
If we divide 79 by 21, we get 3 and a remainder of 16.
Put 3 as the next digit of the answer. 
Result so far: 4704203.0
Subtracting 63 from 79 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 9:
21 goes into 160 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 4704203.7
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 10:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 4704203.76
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 11:
When dividing 40 by 21, we get 1 with a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 4704203.761
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 12:
If we divide 190 by 21, we get 9 and a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 4704203.7619
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 13:
21 goes into 10 0 times with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 4704203.7619
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 14:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 4704203.761904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 15:
21 can be fit into 160 7 times, resulting in a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 4704203.7619047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 16:
130 divided by 21 is 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 4704203.76190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The quotient of the division is 4704203.76190476, and the remainder is 4e-09.