We divide 751487 by 21
We want to figure out the number of times 751487 can be divided by 21.

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
Deduct 0 from 7 and we're left with 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 21

Let's proceed to step 2:
If we divide 75 by 21, we get 3 and a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 63 from 75 and we're left with 12.
Bring next digit (1) of the dividend behind the 12 and repeat the process: 121 / 21

Step 3:
When dividing 121 by 21, we get 5 with a remainder of 16.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
Subtract 105 from 121 to get 16.
Append the next digit (4) from the dividend to 16 and continue with: 164 / 21

Let's proceed to step 4:
The number 21 fits into 164 7 times, leaving a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 357.0
Deduct 147 from 164 and we're left with 17.
Take the next digit (8) from the dividend and append it to 17, then repeat: 178 / 21

Going ahead to step 5:
When dividing 178 by 21, we get 8 with a remainder of 10.
Use 8 as the next digit of our solution. 
Result so far: 3578.0
If we subtract 168 from 178, we get 10.
Bring next digit (7) of the dividend behind the 10 and repeat the process: 107 / 21

On to step 6:
When dividing 107 by 21, we get 5 with a remainder of 2.
Put 5 as the next digit of the answer. 
Result so far: 35785.0
Subtracting 105 from 107 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 7:
21 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 35785.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
If we divide 200 by 21, we get 9 and a remainder of 11.
The next digit of our result is 9. 
Result so far: 35785.09
If we take 189 away from 200, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 9:
When dividing 110 by 21, we get 5 with a remainder of 5.
The next digit of our result is 5. 
Result so far: 35785.095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 10:
50 divided by 21 is 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 35785.0952
The remainder is 8 after subtracting 42 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 11:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 35785.09523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 12:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 35785.095238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 13:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 35785.095238
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 14:
The number 21 fits into 200 9 times, leaving a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 35785.09523809
If we subtract 189 from 200, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The final result is 35785.09523809 with a remainder of 1.1e-08.