21087539 ÷ 527 
We want to divide 21087539 by 527.

Let's proceed to step 1:
If we divide 2 by 527, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 527

On to step 2:
21 divided by 527 is 0 with a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Bring next digit (0) of the dividend behind the 21 and repeat the process: 210 / 527

Advancing to step 3:
527 goes into 210 0 times with a remainder of 210.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 210 and we're left with 210.
Include the next digit (8) from the dividend after 210, then repeat: 2108 / 527

Moving on to step 4:
If we divide 2108 by 527, we get 4 and a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 2108 from 2108 and we're left with 0.
Grab the next digit (7) from the dividend, add it to 0, then carry on: 7 / 527

Advancing to step 5:
527 goes into 7 0 times with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtract 0 from 7 to get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 527

Let's proceed to step 6:
The number 527 fits into 75 0 times, leaving a remainder of 75.
Write down 0 as next digit of the result. 
Result so far: 400.0
If we subtract 0 from 75, we get 75.
Bring next digit (3) of the dividend behind the 75 and repeat the process: 753 / 527

Let's proceed to step 7:
When dividing 753 by 527, we get 1 with a remainder of 226.
The next digit of our result is 1. 
Result so far: 4001.0
Deduct 527 from 753 and we're left with 226.
Append the next digit (9) from the dividend to 226 and continue with: 2269 / 527

Advancing to step 8:
When dividing 2269 by 527, we get 4 with a remainder of 161.
The number 4 becomes the next digit in our result. 
Result so far: 40014.0
Deduct 2108 from 2269 and we're left with 161.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1610, and continue the process.

Going ahead to step 9:
When dividing 1610 by 527, we get 3 with a remainder of 29.
Record the quotient 3 as the next digit in the result. 
Result so far: 40014.3
If we take 1581 away from 1610, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

On to step 10:
527 goes into 290 0 times with a remainder of 290.
Use 0 as the next digit of our solution. 
Result so far: 40014.3
Subtract 0 from 290 to get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Advancing to step 11:
The number 527 fits into 2900 5 times, leaving a remainder of 265.
Put 5 as the next digit of the answer. 
Result so far: 40014.305
Deduct 2635 from 2900 and we're left with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

On to step 12:
527 goes into 2650 5 times with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 40014.3055
Deduct 2635 from 2650 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 40014.3055 with a remainder of 0.00015.