We're dividing 21059788 by 525 
We want to figure out the number of times 21059788 can be divided by 525.

Moving on to step 1:
If we divide 2 by 525, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 525

Step 2:
525 can be fit into 21 0 times, resulting in a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 525

Going ahead to step 3:
525 can be fit into 210 0 times, resulting in a remainder of 210.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 210, we end up with 210.
Bring next digit (5) of the dividend behind the 210 and repeat the process: 2105 / 525

Step 4:
525 can be fit into 2105 4 times, resulting in a remainder of 5.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 2100 from 2105, we get 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 525

Going ahead to step 5:
59 divided by 525 is 0 with a remainder of 59.
Use 0 as the next digit of our solution. 
Result so far: 40.0
Subtract 0 from 59 to get 59.
Bring next digit (7) of the dividend behind the 59 and repeat the process: 597 / 525

Going ahead to step 6:
The number 525 fits into 597 1 times, leaving a remainder of 72.
Put 1 as the next digit of the answer. 
Result so far: 401.0
Subtracting 525 from 597 leaves us with 72.
Fetch the next digit (8) from the dividend, attach it to 72 and continue: 728 / 525

Step 7:
728 divided by 525 is 1 with a remainder of 203.
Write down 1 as next digit of the result. 
Result so far: 4011.0
The remainder is 203 after subtracting 525 from 728.
Fetch the next digit (8) from the dividend, attach it to 203 and continue: 2038 / 525

Step 8:
If we divide 2038 by 525, we get 3 and a remainder of 463.
Record the quotient 3 as the next digit in the result. 
Result so far: 40113.0
Subtracting 1575 from 2038 leaves us with 463.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4630, and continue the process.

Let's proceed to step 9:
4630 divided by 525 is 8 with a remainder of 430.
Record the quotient 8 as the next digit in the result. 
Result so far: 40113.8
If we subtract 4200 from 4630, we get 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Moving on to step 10:
The number 525 fits into 4300 8 times, leaving a remainder of 100.
Record the quotient 8 as the next digit in the result. 
Result so far: 40113.88
Deduct 4200 from 4300 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The quotient of the division is 40113.88, and the remainder is 0.1.