Let's divide 77517642 by 21
Our goal is to divide 77517642 by 21.

Let's proceed to step 1:
21 goes into 7 0 times with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 21

Step 2:
21 can be fit into 77 3 times, resulting in a remainder of 14.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 63 from 77 leaves us with 14.
Grab the next digit (5) from the dividend, add it to 14, then carry on: 145 / 21

Going ahead to step 3:
21 can be fit into 145 6 times, resulting in a remainder of 19.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtracting 126 from 145 leaves us with 19.
Include the next digit (1) from the dividend after 19, then repeat: 191 / 21

Advancing to step 4:
When dividing 191 by 21, we get 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 369.0
The remainder is 2 after subtracting 189 from 191.
Bring next digit (7) of the dividend behind the 2 and repeat the process: 27 / 21

Step 5:
When dividing 27 by 21, we get 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 3691.0
The remainder is 6 after subtracting 21 from 27.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 21

Going ahead to step 6:
66 divided by 21 is 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 36913.0
Subtracting 63 from 66 leaves us with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 21

Let's proceed to step 7:
When dividing 34 by 21, we get 1 with a remainder of 13.
Put 1 as the next digit of the answer. 
Result so far: 369131.0
Subtract 21 from 34 to get 13.
Bring next digit (2) of the dividend behind the 13 and repeat the process: 132 / 21

Going ahead to step 8:
If we divide 132 by 21, we get 6 and a remainder of 6.
Use 6 as the next digit of our solution. 
Result so far: 3691316.0
If we take 126 away from 132, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 9:
If we divide 60 by 21, we get 2 and a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 3691316.2
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 10:
When dividing 180 by 21, we get 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 3691316.28
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 11:
120 divided by 21 is 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 3691316.285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 12:
The number 21 fits into 150 7 times, leaving a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 3691316.2857
Deduct 147 from 150 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 13:
30 divided by 21 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 3691316.28571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 14:
90 divided by 21 is 4 with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 3691316.285714
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 15:
The number 21 fits into 60 2 times, leaving a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 3691316.2857142
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 16:
When dividing 180 by 21, we get 8 with a remainder of 12.
The next digit of our result is 8. 
Result so far: 3691316.28571428
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

The quotient of the division is 3691316.28571428, and the remainder is 1.2e-08.