Let's divide 80010239 by 810
We want to figure out the number of times 80010239 can be divided by 810.

Step 1:
810 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Take the next digit (0) from the dividend and append it to 8, then repeat: 80 / 810

On to step 2:
If we divide 80 by 810, we get 0 and a remainder of 80.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Append the next digit (0) from the dividend to 80 and continue with: 800 / 810

Step 3:
If we divide 800 by 810, we get 0 and a remainder of 800.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 800 to get 800.
Fetch the next digit (1) from the dividend, attach it to 800 and continue: 8001 / 810

Going ahead to step 4:
When dividing 8001 by 810, we get 9 with a remainder of 711.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 7290 from 8001, we get 711.
Fetch the next digit (0) from the dividend, attach it to 711 and continue: 7110 / 810

Let's proceed to step 5:
810 can be fit into 7110 8 times, resulting in a remainder of 630.
Use 8 as the next digit of our solution. 
Result so far: 98.0
Subtract 6480 from 7110 to get 630.
Append the next digit (2) from the dividend to 630 and continue with: 6302 / 810

Step 6:
6302 divided by 810 is 7 with a remainder of 632.
Write down 7 as next digit of the result. 
Result so far: 987.0
If we take 5670 away from 6302, we end up with 632.
Append the next digit (3) from the dividend to 632 and continue with: 6323 / 810

On to step 7:
6323 divided by 810 is 7 with a remainder of 653.
Record the quotient 7 as the next digit in the result. 
Result so far: 9877.0
If we subtract 5670 from 6323, we get 653.
Grab the next digit (9) from the dividend, add it to 653, then carry on: 6539 / 810

On to step 8:
6539 divided by 810 is 8 with a remainder of 59.
The next digit of our result is 8. 
Result so far: 98778.0
Deduct 6480 from 6539 and we're left with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Let's proceed to step 9:
If we divide 590 by 810, we get 0 and a remainder of 590.
The next digit of our result is 0. 
Result so far: 98778.0
The remainder is 590 after subtracting 0 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Advancing to step 10:
The number 810 fits into 5900 7 times, leaving a remainder of 230.
Put 7 as the next digit of the answer. 
Result so far: 98778.07
Deduct 5670 from 5900 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Advancing to step 11:
If we divide 2300 by 810, we get 2 and a remainder of 680.
The next digit of our result is 2. 
Result so far: 98778.072
If we take 1620 away from 2300, we end up with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

Advancing to step 12:
When dividing 6800 by 810, we get 8 with a remainder of 320.
Record the quotient 8 as the next digit in the result. 
Result so far: 98778.0728
Subtract 6480 from 6800 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Step 13:
3200 divided by 810 is 3 with a remainder of 770.
Put 3 as the next digit of the answer. 
Result so far: 98778.07283
The remainder is 770 after subtracting 2430 from 3200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

Let's proceed to step 14:
810 can be fit into 7700 9 times, resulting in a remainder of 410.
Record the quotient 9 as the next digit in the result. 
Result so far: 98778.072839
Subtracting 7290 from 7700 leaves us with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Going ahead to step 15:
If we divide 4100 by 810, we get 5 and a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 98778.0728395
The remainder is 50 after subtracting 4050 from 4100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 16:
810 can be fit into 500 0 times, resulting in a remainder of 500.
The next digit of our result is 0. 
Result so far: 98778.0728395
If we subtract 0 from 500, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

After the division, we end up with 98778.0728395 and a remainder of 5e-07.