We're dividing 21078123 by 500 
Our goal is to divide 21078123 by 500.

On to step 1:
When dividing 2 by 500, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 500

Advancing to step 2:
21 divided by 500 is 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 21, we get 21.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 500

Advancing to step 3:
210 divided by 500 is 0 with a remainder of 210.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 210 and we're left with 210.
Append the next digit (7) from the dividend to 210 and continue with: 2107 / 500

Advancing to step 4:
When dividing 2107 by 500, we get 4 with a remainder of 107.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtract 2000 from 2107 to get 107.
Append the next digit (8) from the dividend to 107 and continue with: 1078 / 500

Moving on to step 5:
1078 divided by 500 is 2 with a remainder of 78.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we take 1000 away from 1078, we end up with 78.
Include the next digit (1) from the dividend after 78, then repeat: 781 / 500

Advancing to step 6:
If we divide 781 by 500, we get 1 and a remainder of 281.
Record the quotient 1 as the next digit in the result. 
Result so far: 421.0
Subtracting 500 from 781 leaves us with 281.
Append the next digit (2) from the dividend to 281 and continue with: 2812 / 500

Let's proceed to step 7:
500 can be fit into 2812 5 times, resulting in a remainder of 312.
Use 5 as the next digit of our solution. 
Result so far: 4215.0
Deduct 2500 from 2812 and we're left with 312.
Append the next digit (3) from the dividend to 312 and continue with: 3123 / 500

Moving on to step 8:
The number 500 fits into 3123 6 times, leaving a remainder of 123.
Use 6 as the next digit of our solution. 
Result so far: 42156.0
If we subtract 3000 from 3123, we get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

Moving on to step 9:
500 goes into 1230 2 times with a remainder of 230.
Use 2 as the next digit of our solution. 
Result so far: 42156.2
If we subtract 1000 from 1230, we get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Moving on to step 10:
The number 500 fits into 2300 4 times, leaving a remainder of 300.
The next digit of our result is 4. 
Result so far: 42156.24
If we take 2000 away from 2300, we end up with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Advancing to step 11:
When dividing 3000 by 500, we get 6 with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 42156.246
If we subtract 3000 from 3000, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 12:
If we divide 0 by 500, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 42156.246
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
500 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 42156.246
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 42156.246 with a remaining 0.0.