Let's divide 21125081 by 387
We want to divide 21125081 by 387.

Going ahead to step 1:
387 goes into 2 0 times 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.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 387

Let's proceed to step 2:
When dividing 21 by 387, we get 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Append the next digit (1) from the dividend to 21 and continue with: 211 / 387

Advancing to step 3:
211 divided by 387 is 0 with a remainder of 211.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 211 and we're left with 211.
Take the next digit (2) from the dividend and append it to 211, then repeat: 2112 / 387

Moving on to step 4:
When dividing 2112 by 387, we get 5 with a remainder of 177.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 1935 from 2112, we get 177.
Append the next digit (5) from the dividend to 177 and continue with: 1775 / 387

Moving on to step 5:
387 goes into 1775 4 times with a remainder of 227.
Write down 4 as next digit of the result. 
Result so far: 54.0
If we subtract 1548 from 1775, we get 227.
Bring next digit (0) of the dividend behind the 227 and repeat the process: 2270 / 387

Moving on to step 6:
If we divide 2270 by 387, we get 5 and a remainder of 335.
Record the quotient 5 as the next digit in the result. 
Result so far: 545.0
If we subtract 1935 from 2270, we get 335.
Take the next digit (8) from the dividend and append it to 335, then repeat: 3358 / 387

Going ahead to step 7:
If we divide 3358 by 387, we get 8 and a remainder of 262.
Write down 8 as next digit of the result. 
Result so far: 5458.0
If we take 3096 away from 3358, we end up with 262.
Grab the next digit (1) from the dividend, add it to 262, then carry on: 2621 / 387

Moving on to step 8:
If we divide 2621 by 387, we get 6 and a remainder of 299.
The next digit of our result is 6. 
Result so far: 54586.0
If we take 2322 away from 2621, we end up with 299.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2990, and continue the process.

Step 9:
387 goes into 2990 7 times with a remainder of 281.
The number 7 becomes the next digit in our result. 
Result so far: 54586.7
If we take 2709 away from 2990, we end up with 281.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2810, and continue the process.

On to step 10:
The number 387 fits into 2810 7 times, leaving a remainder of 101.
Put 7 as the next digit of the answer. 
Result so far: 54586.77
The remainder is 101 after subtracting 2709 from 2810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

In conclusion, the division gives 54586.77 with a balance of 0.101.