21130962 divided by 51 
We want to figure out the number of times 21130962 can be divided by 51.

Step 1:
51 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 51

Moving on to step 2:
When dividing 21 by 51, we get 0 with a remainder of 21.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (1) from the dividend after 21, then repeat: 211 / 51

On to step 3:
If we divide 211 by 51, we get 4 and a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 204 from 211, we get 7.
Bring next digit (3) of the dividend behind the 7 and repeat the process: 73 / 51

Moving on to step 4:
51 goes into 73 1 times with a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 41.0
Subtract 51 from 73 to get 22.
Append the next digit (0) from the dividend to 22 and continue with: 220 / 51

Advancing to step 5:
220 divided by 51 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 414.0
Subtracting 204 from 220 leaves us with 16.
Include the next digit (9) from the dividend after 16, then repeat: 169 / 51

Moving on to step 6:
51 goes into 169 3 times with a remainder of 16.
Use 3 as the next digit of our solution. 
Result so far: 4143.0
Subtract 153 from 169 to get 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 51

Going ahead to step 7:
If we divide 166 by 51, we get 3 and a remainder of 13.
Write down 3 as next digit of the result. 
Result so far: 41433.0
If we take 153 away from 166, we end up with 13.
Include the next digit (2) from the dividend after 13, then repeat: 132 / 51

Moving on to step 8:
When dividing 132 by 51, we get 2 with a remainder of 30.
Put 2 as the next digit of the answer. 
Result so far: 414332.0
If we take 102 away from 132, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
51 can be fit into 300 5 times, resulting in a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 414332.5
The remainder is 45 after subtracting 255 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 10:
51 goes into 450 8 times with a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 414332.58
If we take 408 away from 450, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Advancing to step 11:
When dividing 420 by 51, we get 8 with a remainder of 12.
Use 8 as the next digit of our solution. 
Result so far: 414332.588
If we take 408 away from 420, we end up 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 414332.588, and the remainder is 0.0012.