21260363 ÷ 10 
Let's see how many times 10 fits into 21260363.

On to step 1:
2 divided by 10 is 0 with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 10

On to step 2:
21 divided by 10 is 2 with a remainder of 1.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 20 from 21 and we're left with 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 10

Going ahead to step 3:
10 goes into 12 1 times with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 21.0
Subtract 10 from 12 to get 2.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 10

Moving on to step 4:
The number 10 fits into 26 2 times, leaving a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 212.0
The remainder is 6 after subtracting 20 from 26.
Bring next digit (0) of the dividend behind the 6 and repeat the process: 60 / 10

On to step 5:
10 can be fit into 60 6 times, resulting in a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 2126.0
The remainder is 0 after subtracting 60 from 60.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 10

Let's proceed to step 6:
If we divide 3 by 10, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 21260.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 10

Let's proceed to step 7:
If we divide 36 by 10, we get 3 and a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 212603.0
Subtracting 30 from 36 leaves us with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 10

On to step 8:
If we divide 63 by 10, we get 6 and a remainder of 3.
The next digit of our result is 6. 
Result so far: 2126036.0
The remainder is 3 after subtracting 60 from 63.
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 9:
10 goes into 30 3 times with a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 2126036.3
If we take 30 away from 30, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 10:
0 divided by 10 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 2126036.3
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
10 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 2126036.3
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 2126036.3, and the remainder is 0.0.