771198 ÷ 21 
Our goal is to divide 771198 by 21.

Let's proceed to step 1:
The number 21 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 21

Step 2:
The number 21 fits into 77 3 times, leaving 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 (1) of the dividend behind the 14 and repeat the process: 141 / 21

Let's proceed to step 3:
141 divided by 21 is 6 with a remainder of 15.
The number 6 becomes the next digit in our result. 
Result so far: 36.0
If we subtract 126 from 141, we get 15.
Grab the next digit (1) from the dividend, add it to 15, then carry on: 151 / 21

On to step 4:
151 divided by 21 is 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 367.0
Subtract 147 from 151 to get 4.
Take the next digit (9) from the dividend and append it to 4, then repeat: 49 / 21

Moving on to step 5:
49 divided by 21 is 2 with a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 3672.0
If we subtract 42 from 49, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 21

Going ahead to step 6:
21 goes into 78 3 times with a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 36723.0
The remainder is 15 after subtracting 63 from 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 7:
150 divided by 21 is 7 with a remainder of 3.
The next digit of our result is 7. 
Result so far: 36723.7
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 8:
The number 21 fits into 30 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 36723.71
Subtracting 21 from 30 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
If we divide 90 by 21, we get 4 and a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 36723.714
Subtracting 84 from 90 leaves us 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.

Let's proceed to step 10:
If we divide 60 by 21, we get 2 and a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 36723.7142
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 11:
21 goes into 180 8 times with a remainder of 12.
The next digit of our result is 8. 
Result so far: 36723.71428
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.

Advancing to step 12:
If we divide 120 by 21, we get 5 and a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 36723.714285
If we subtract 105 from 120, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 13:
21 can be fit into 150 7 times, resulting in a remainder of 3.
The next digit of our result is 7. 
Result so far: 36723.7142857
Subtract 147 from 150 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 14:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 36723.71428571
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.

Our division results in 36723.71428571 with a remaining 9e-09.