Let's divide 21237571 by 555
We're looking to find how many times 555 goes into 21237571.

Going ahead to step 1:
555 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
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 / 555

Moving on to step 2:
21 divided by 555 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 555

Step 3:
The number 555 fits into 212 0 times, leaving a remainder of 212.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 212 and we're left with 212.
Bring next digit (3) of the dividend behind the 212 and repeat the process: 2123 / 555

Let's proceed to step 4:
The number 555 fits into 2123 3 times, leaving a remainder of 458.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 1665 from 2123, we get 458.
Grab the next digit (7) from the dividend, add it to 458, then carry on: 4587 / 555

Let's proceed to step 5:
The number 555 fits into 4587 8 times, leaving a remainder of 147.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Subtract 4440 from 4587 to get 147.
Append the next digit (5) from the dividend to 147 and continue with: 1475 / 555

On to step 6:
555 can be fit into 1475 2 times, resulting in a remainder of 365.
Record the quotient 2 as the next digit in the result. 
Result so far: 382.0
The remainder is 365 after subtracting 1110 from 1475.
Grab the next digit (7) from the dividend, add it to 365, then carry on: 3657 / 555

Step 7:
555 goes into 3657 6 times with a remainder of 327.
The next digit of our result is 6. 
Result so far: 3826.0
If we take 3330 away from 3657, we end up with 327.
Include the next digit (1) from the dividend after 327, then repeat: 3271 / 555

Moving on to step 8:
555 goes into 3271 5 times with a remainder of 496.
Record the quotient 5 as the next digit in the result. 
Result so far: 38265.0
The remainder is 496 after subtracting 2775 from 3271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Going ahead to step 9:
The number 555 fits into 4960 8 times, leaving a remainder of 520.
Record the quotient 8 as the next digit in the result. 
Result so far: 38265.8
Subtracting 4440 from 4960 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Advancing to step 10:
555 goes into 5200 9 times with a remainder of 205.
Record the quotient 9 as the next digit in the result. 
Result so far: 38265.89
Deduct 4995 from 5200 and we're left with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Let's proceed to step 11:
When dividing 2050 by 555, we get 3 with a remainder of 385.
The next digit of our result is 3. 
Result so far: 38265.893
Subtract 1665 from 2050 to get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

On to step 12:
If we divide 3850 by 555, we get 6 and a remainder of 520.
Record the quotient 6 as the next digit in the result. 
Result so far: 38265.8936
Subtract 3330 from 3850 to get 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Moving on to step 13:
If we divide 5200 by 555, we get 9 and a remainder of 205.
Record the quotient 9 as the next digit in the result. 
Result so far: 38265.89369
If we take 4995 away from 5200, we end up with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Let's proceed to step 14:
If we divide 2050 by 555, we get 3 and a remainder of 385.
Record the quotient 3 as the next digit in the result. 
Result so far: 38265.893693
Subtract 1665 from 2050 to get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Going ahead to step 15:
If we divide 3850 by 555, we get 6 and a remainder of 520.
The number 6 becomes the next digit in our result. 
Result so far: 38265.8936936
Subtracting 3330 from 3850 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Going ahead to step 16:
If we divide 5200 by 555, we get 9 and a remainder of 205.
The number 9 becomes the next digit in our result. 
Result so far: 38265.89369369
If we take 4995 away from 5200, we end up with 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

The final outcome is 38265.89369369, with a leftover of 2.05e-07.