We're dividing 21212615 by 476 
We want to figure out the number of times 21212615 can be divided by 476.

Moving on to step 1:
When dividing 2 by 476, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 476

On to step 2:
The number 476 fits into 21 0 times, leaving a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Grab the next digit (2) from the dividend, add it to 21, then carry on: 212 / 476

Advancing to step 3:
The number 476 fits into 212 0 times, leaving a remainder of 212.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 212 and we're left with 212.
Append the next digit (1) from the dividend to 212 and continue with: 2121 / 476

Going ahead to step 4:
The number 476 fits into 2121 4 times, leaving a remainder of 217.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 217 after subtracting 1904 from 2121.
Take the next digit (2) from the dividend and append it to 217, then repeat: 2172 / 476

On to step 5:
The number 476 fits into 2172 4 times, leaving a remainder of 268.
The next digit of our result is 4. 
Result so far: 44.0
If we take 1904 away from 2172, we end up with 268.
Bring next digit (6) of the dividend behind the 268 and repeat the process: 2686 / 476

Going ahead to step 6:
The number 476 fits into 2686 5 times, leaving a remainder of 306.
The number 5 becomes the next digit in our result. 
Result so far: 445.0
Subtracting 2380 from 2686 leaves us with 306.
Append the next digit (1) from the dividend to 306 and continue with: 3061 / 476

Advancing to step 7:
The number 476 fits into 3061 6 times, leaving a remainder of 205.
Record the quotient 6 as the next digit in the result. 
Result so far: 4456.0
If we subtract 2856 from 3061, we get 205.
Grab the next digit (5) from the dividend, add it to 205, then carry on: 2055 / 476

Advancing to step 8:
2055 divided by 476 is 4 with a remainder of 151.
Use 4 as the next digit of our solution. 
Result so far: 44564.0
Subtracting 1904 from 2055 leaves us with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Moving on to step 9:
When dividing 1510 by 476, we get 3 with a remainder of 82.
Use 3 as the next digit of our solution. 
Result so far: 44564.3
Subtracting 1428 from 1510 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Advancing to step 10:
820 divided by 476 is 1 with a remainder of 344.
Write down 1 as next digit of the result. 
Result so far: 44564.31
If we subtract 476 from 820, we get 344.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3440, and continue the process.

On to step 11:
476 goes into 3440 7 times with a remainder of 108.
The next digit of our result is 7. 
Result so far: 44564.317
Subtracting 3332 from 3440 leaves us with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 12:
1080 divided by 476 is 2 with a remainder of 128.
The number 2 becomes the next digit in our result. 
Result so far: 44564.3172
Subtract 952 from 1080 to get 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Going ahead to step 13:
When dividing 1280 by 476, we get 2 with a remainder of 328.
The next digit of our result is 2. 
Result so far: 44564.31722
Subtracting 952 from 1280 leaves us with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

The final outcome is 44564.31722, with a leftover of 0.000328.