Let's divide 77219690 by 21
Our goal is to divide 77219690 by 21.

Let's proceed to step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 21

Moving on to step 2:
When dividing 77 by 21, we get 3 with a remainder of 14.
The next digit of our result is 3. 
Result so far: 3.0
If we take 63 away from 77, we end up with 14.
Bring next digit (2) of the dividend behind the 14 and repeat the process: 142 / 21

Moving on to step 3:
21 goes into 142 6 times with a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 36.0
If we take 126 away from 142, we end up with 16.
Take the next digit (1) from the dividend and append it to 16, then repeat: 161 / 21

On to step 4:
The number 21 fits into 161 7 times, leaving a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 367.0
Subtract 147 from 161 to get 14.
Append the next digit (9) from the dividend to 14 and continue with: 149 / 21

Let's proceed to step 5:
If we divide 149 by 21, we get 7 and a remainder of 2.
Write down 7 as next digit of the result. 
Result so far: 3677.0
The remainder is 2 after subtracting 147 from 149.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 21

Moving on to step 6:
If we divide 26 by 21, we get 1 and a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 36771.0
Subtract 21 from 26 to get 5.
Fetch the next digit (9) from the dividend, attach it to 5 and continue: 59 / 21

Moving on to step 7:
21 goes into 59 2 times with a remainder of 17.
The next digit of our result is 2. 
Result so far: 367712.0
Subtract 42 from 59 to get 17.
Take the next digit (0) from the dividend and append it to 17, then repeat: 170 / 21

Going ahead to step 8:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 3677128.0
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
21 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 3677128.0
Subtract 0 from 20 to 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.

Let's proceed to step 10:
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: 3677128.09
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.

Moving on to step 11:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 3677128.095
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.

Going ahead to step 12:
When dividing 50 by 21, we get 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 3677128.0952
If we subtract 42 from 50, we 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.

Let's proceed to step 13:
80 divided by 21 is 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 3677128.09523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 14:
170 divided by 21 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 3677128.095238
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.

Going ahead to step 15:
21 goes into 20 0 times with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 3677128.095238
If we take 0 away from 20, we end up 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.

Going ahead to step 16:
When dividing 200 by 21, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 3677128.09523809
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.

After the division, we end up with 3677128.09523809 and a remainder of 1.1e-08.