Let's divide 75951447 by 21
We're looking to find how many times 21 goes into 75951447.

Advancing 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
Subtract 0 from 7 to get 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 21

On to step 2:
The number 21 fits into 75 3 times, leaving a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 3.0
If we subtract 63 from 75, we get 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 21

Advancing to step 3:
21 can be fit into 129 6 times, resulting in a remainder of 3.
The next digit of our result is 6. 
Result so far: 36.0
If we subtract 126 from 129, we get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 21

Going ahead to step 4:
If we divide 35 by 21, we get 1 and a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 361.0
If we subtract 21 from 35, we get 14.
Include the next digit (1) from the dividend after 14, then repeat: 141 / 21

Let's proceed to step 5:
21 goes into 141 6 times with a remainder of 15.
The next digit of our result is 6. 
Result so far: 3616.0
If we take 126 away from 141, we end up with 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 21

Advancing to step 6:
21 can be fit into 154 7 times, resulting in a remainder of 7.
The next digit of our result is 7. 
Result so far: 36167.0
If we take 147 away from 154, we end up with 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 21

Let's proceed to step 7:
21 can be fit into 74 3 times, resulting in a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 361673.0
If we subtract 63 from 74, we get 11.
Take the next digit (7) from the dividend and append it to 11, then repeat: 117 / 21

On to step 8:
117 divided by 21 is 5 with a remainder of 12.
The number 5 becomes the next digit in our result. 
Result so far: 3616735.0
Subtract 105 from 117 to get 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 9:
21 goes into 120 5 times with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 3616735.5
If we take 105 away from 120, we end up 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.

Let's proceed to step 10:
If we divide 150 by 21, we get 7 and a remainder of 3.
The next digit of our result is 7. 
Result so far: 3616735.57
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.

Going ahead to step 11:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 3616735.571
If we take 21 away from 30, we end up 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.

Step 12:
90 divided by 21 is 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 3616735.5714
The remainder is 6 after subtracting 84 from 90.
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 13:
60 divided by 21 is 2 with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 3616735.57142
If we subtract 42 from 60, we get 18.
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 14:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 3616735.571428
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.

Going ahead to step 15:
When dividing 120 by 21, we get 5 with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 3616735.5714285
Subtract 105 from 120 to 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.

Advancing to step 16:
If we divide 150 by 21, we get 7 and a remainder of 3.
The next digit of our result is 7. 
Result so far: 3616735.57142857
If we take 147 away from 150, we end up 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.

Our division results in 3616735.57142857 with a remaining 3e-09.