We're dividing 79215539 by 810 
We want to figure out the number of times 79215539 can be divided by 810.

Let's proceed to step 1:
The number 810 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 810

Let's proceed to step 2:
When dividing 79 by 810, we get 0 with a remainder of 79.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 79 after subtracting 0 from 79.
Grab the next digit (2) from the dividend, add it to 79, then carry on: 792 / 810

Going ahead to step 3:
792 divided by 810 is 0 with a remainder of 792.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 792, we end up with 792.
Include the next digit (1) from the dividend after 792, then repeat: 7921 / 810

Moving on to step 4:
810 goes into 7921 9 times with a remainder of 631.
Put 9 as the next digit of the answer. 
Result so far: 9.0
The remainder is 631 after subtracting 7290 from 7921.
Take the next digit (5) from the dividend and append it to 631, then repeat: 6315 / 810

Moving on to step 5:
810 can be fit into 6315 7 times, resulting in a remainder of 645.
Put 7 as the next digit of the answer. 
Result so far: 97.0
Subtract 5670 from 6315 to get 645.
Grab the next digit (5) from the dividend, add it to 645, then carry on: 6455 / 810

Advancing to step 6:
6455 divided by 810 is 7 with a remainder of 785.
The next digit of our result is 7. 
Result so far: 977.0
If we take 5670 away from 6455, we end up with 785.
Grab the next digit (3) from the dividend, add it to 785, then carry on: 7853 / 810

Advancing to step 7:
If we divide 7853 by 810, we get 9 and a remainder of 563.
Write down 9 as next digit of the result. 
Result so far: 9779.0
Deduct 7290 from 7853 and we're left with 563.
Include the next digit (9) from the dividend after 563, then repeat: 5639 / 810

Step 8:
810 can be fit into 5639 6 times, resulting in a remainder of 779.
Put 6 as the next digit of the answer. 
Result so far: 97796.0
Deduct 4860 from 5639 and we're left with 779.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7790, and continue the process.

Let's proceed to step 9:
If we divide 7790 by 810, we get 9 and a remainder of 500.
Write down 9 as next digit of the result. 
Result so far: 97796.9
Deduct 7290 from 7790 and we're left with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Step 10:
If we divide 5000 by 810, we get 6 and a remainder of 140.
Write down 6 as next digit of the result. 
Result so far: 97796.96
The remainder is 140 after subtracting 4860 from 5000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 11:
1400 divided by 810 is 1 with a remainder of 590.
Use 1 as the next digit of our solution. 
Result so far: 97796.961
If we subtract 810 from 1400, we get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

Let's proceed to step 12:
810 goes into 5900 7 times with a remainder of 230.
The next digit of our result is 7. 
Result so far: 97796.9617
If we subtract 5670 from 5900, 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 13:
If we divide 2300 by 810, we get 2 and a remainder of 680.
Use 2 as the next digit of our solution. 
Result so far: 97796.96172
Deduct 1620 from 2300 and we're left 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.

Step 14:
When dividing 6800 by 810, we get 8 with a remainder of 320.
Write down 8 as next digit of the result. 
Result so far: 97796.961728
If we subtract 6480 from 6800, we 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.

Advancing to step 15:
810 goes into 3200 3 times with a remainder of 770.
The next digit of our result is 3. 
Result so far: 97796.9617283
Subtract 2430 from 3200 to get 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

On to step 16:
When dividing 7700 by 810, we get 9 with a remainder of 410.
Record the quotient 9 as the next digit in the result. 
Result so far: 97796.96172839
If we take 7290 away from 7700, we end up 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.

Our division results in 97796.96172839 with a remaining 4.1e-07.