We're dividing 751179 by 21 
We want to figure out the number of times 751179 can be divided by 21.

Advancing to step 1:
21 can be fit into 7 0 times, resulting in a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 21

Advancing to step 2:
The number 21 fits into 75 3 times, leaving a remainder of 12.
The next digit of our result is 3. 
Result so far: 3.0
Deduct 63 from 75 and we're left with 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 21

Going ahead to step 3:
The number 21 fits into 121 5 times, leaving a remainder of 16.
The next digit of our result is 5. 
Result so far: 35.0
Deduct 105 from 121 and we're left with 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 21

Moving on to step 4:
21 goes into 161 7 times with a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 357.0
If we subtract 147 from 161, we get 14.
Take the next digit (7) from the dividend and append it to 14, then repeat: 147 / 21

Advancing to step 5:
When dividing 147 by 21, we get 7 with a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 3577.0
The remainder is 0 after subtracting 147 from 147.
Fetch the next digit (9) from the dividend, attach it to 0 and continue: 9 / 21

On to step 6:
9 divided by 21 is 0 with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 35770.0
The remainder is 9 after subtracting 0 from 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 35770.4
If we subtract 84 from 90, we get 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 8:
21 goes into 60 2 times with a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 35770.42
The remainder is 18 after subtracting 42 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 9:
If we divide 180 by 21, we get 8 and a remainder of 12.
The next digit of our result is 8. 
Result so far: 35770.428
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.

Let's proceed to step 10:
The number 21 fits into 120 5 times, leaving a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 35770.4285
Subtracting 105 from 120 leaves us with 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 11:
150 divided by 21 is 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 35770.42857
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.

Advancing to step 12:
If we divide 30 by 21, we get 1 and a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 35770.428571
The remainder is 9 after subtracting 21 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 13:
The number 21 fits into 90 4 times, leaving a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 35770.4285714
Subtract 84 from 90 to get 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 14:
21 goes into 60 2 times with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 35770.42857142
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.

After the division, we end up with 35770.42857142 and a remainder of 1.8e-08.