Let's divide 21138847 by 761
We want to figure out the number of times 21138847 can be divided by 761.

On to step 1:
2 divided by 761 is 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 761

Going ahead to step 2:
If we divide 21 by 761, we get 0 and a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 761

Going ahead to step 3:
When dividing 211 by 761, we get 0 with a remainder of 211.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 211 and we're left with 211.
Include the next digit (3) from the dividend after 211, then repeat: 2113 / 761

Let's proceed to step 4:
2113 divided by 761 is 2 with a remainder of 591.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we subtract 1522 from 2113, we get 591.
Bring next digit (8) of the dividend behind the 591 and repeat the process: 5918 / 761

On to step 5:
761 can be fit into 5918 7 times, resulting in a remainder of 591.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Subtract 5327 from 5918 to get 591.
Bring next digit (8) of the dividend behind the 591 and repeat the process: 5918 / 761

Step 6:
761 goes into 5918 7 times with a remainder of 591.
The number 7 becomes the next digit in our result. 
Result so far: 277.0
The remainder is 591 after subtracting 5327 from 5918.
Include the next digit (4) from the dividend after 591, then repeat: 5914 / 761

Step 7:
5914 divided by 761 is 7 with a remainder of 587.
The next digit of our result is 7. 
Result so far: 2777.0
If we take 5327 away from 5914, we end up with 587.
Fetch the next digit (7) from the dividend, attach it to 587 and continue: 5877 / 761

Step 8:
761 goes into 5877 7 times with a remainder of 550.
The next digit of our result is 7. 
Result so far: 27777.0
If we take 5327 away from 5877, we end up with 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

Advancing to step 9:
761 goes into 5500 7 times with a remainder of 173.
The number 7 becomes the next digit in our result. 
Result so far: 27777.7
Subtract 5327 from 5500 to get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Let's proceed to step 10:
761 can be fit into 1730 2 times, resulting in a remainder of 208.
Write down 2 as next digit of the result. 
Result so far: 27777.72
The remainder is 208 after subtracting 1522 from 1730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

On to step 11:
2080 divided by 761 is 2 with a remainder of 558.
The next digit of our result is 2. 
Result so far: 27777.722
The remainder is 558 after subtracting 1522 from 2080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5580, and continue the process.

The quotient of the division is 27777.722, and the remainder is 0.0558.