Let's divide 76091077 by 21
We want to divide 76091077 by 21.

Step 1:
21 goes into 7 0 times with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (6) from the dividend, add it to 7, then carry on: 76 / 21

Advancing to step 2:
21 can be fit into 76 3 times, resulting in a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 63 from 76 leaves us with 13.
Bring next digit (0) of the dividend behind the 13 and repeat the process: 130 / 21

On to step 3:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Deduct 126 from 130 and we're left with 4.
Grab the next digit (9) from the dividend, add it to 4, then carry on: 49 / 21

Going ahead to step 4:
21 can be fit into 49 2 times, resulting in a remainder of 7.
Record the quotient 2 as the next digit in the result. 
Result so far: 362.0
If we subtract 42 from 49, we get 7.
Fetch the next digit (1) from the dividend, attach it to 7 and continue: 71 / 21

Step 5:
The number 21 fits into 71 3 times, leaving a remainder of 8.
The next digit of our result is 3. 
Result so far: 3623.0
If we take 63 away from 71, we end up with 8.
Bring next digit (0) of the dividend behind the 8 and repeat the process: 80 / 21

Let's proceed to step 6:
21 goes into 80 3 times with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 36233.0
Subtract 63 from 80 to get 17.
Fetch the next digit (7) from the dividend, attach it to 17 and continue: 177 / 21

Moving on to step 7:
If we divide 177 by 21, we get 8 and a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 362338.0
If we subtract 168 from 177, we get 9.
Include the next digit (7) from the dividend after 9, then repeat: 97 / 21

Moving on to step 8:
The number 21 fits into 97 4 times, leaving a remainder of 13.
The number 4 becomes the next digit in our result. 
Result so far: 3623384.0
Subtract 84 from 97 to 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.

Let's proceed to step 9:
21 goes into 130 6 times with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 3623384.6
If we subtract 126 from 130, we get 4.
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 10:
40 divided by 21 is 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 3623384.61
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.

Step 11:
If we divide 190 by 21, we get 9 and a remainder of 1.
The next digit of our result is 9. 
Result so far: 3623384.619
If we take 189 away from 190, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 12:
If we divide 10 by 21, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 3623384.619
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 13:
If we divide 100 by 21, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 3623384.61904
If we take 84 away from 100, we end up 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.

Advancing to step 14:
21 goes into 160 7 times with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 3623384.619047
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.

Step 15:
The number 21 fits into 130 6 times, leaving a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 3623384.6190476
If we subtract 126 from 130, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 16:
If we divide 40 by 21, we get 1 and a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 3623384.61904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The quotient of the division is 3623384.61904761, and the remainder is 1.9e-08.