We look at the division of 87212445 by 879 
We want to divide 87212445 by 879.

Going ahead to step 1:
879 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (7) from the dividend, add it to 8, then carry on: 87 / 879

Let's proceed to step 2:
879 goes into 87 0 times with a remainder of 87.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Fetch the next digit (2) from the dividend, attach it to 87 and continue: 872 / 879

Let's proceed to step 3:
If we divide 872 by 879, we get 0 and a remainder of 872.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 872, we get 872.
Fetch the next digit (1) from the dividend, attach it to 872 and continue: 8721 / 879

Step 4:
If we divide 8721 by 879, we get 9 and a remainder of 810.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 7911 from 8721, we get 810.
Fetch the next digit (2) from the dividend, attach it to 810 and continue: 8102 / 879

Advancing to step 5:
8102 divided by 879 is 9 with a remainder of 191.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
Subtract 7911 from 8102 to get 191.
Fetch the next digit (4) from the dividend, attach it to 191 and continue: 1914 / 879

Let's proceed to step 6:
When dividing 1914 by 879, we get 2 with a remainder of 156.
Use 2 as the next digit of our solution. 
Result so far: 992.0
Subtracting 1758 from 1914 leaves us with 156.
Append the next digit (4) from the dividend to 156 and continue with: 1564 / 879

Going ahead to step 7:
If we divide 1564 by 879, we get 1 and a remainder of 685.
The next digit of our result is 1. 
Result so far: 9921.0
The remainder is 685 after subtracting 879 from 1564.
Grab the next digit (5) from the dividend, add it to 685, then carry on: 6855 / 879

Let's proceed to step 8:
6855 divided by 879 is 7 with a remainder of 702.
Put 7 as the next digit of the answer. 
Result so far: 99217.0
Deduct 6153 from 6855 and we're left with 702.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7020, and continue the process.

On to step 9:
879 goes into 7020 7 times with a remainder of 867.
Record the quotient 7 as the next digit in the result. 
Result so far: 99217.7
If we subtract 6153 from 7020, we get 867.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8670, and continue the process.

Moving on to step 10:
8670 divided by 879 is 9 with a remainder of 759.
Use 9 as the next digit of our solution. 
Result so far: 99217.79
The remainder is 759 after subtracting 7911 from 8670.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7590, and continue the process.

Step 11:
If we divide 7590 by 879, we get 8 and a remainder of 558.
The next digit of our result is 8. 
Result so far: 99217.798
If we subtract 7032 from 7590, we get 558.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5580, and continue the process.

Step 12:
The number 879 fits into 5580 6 times, leaving a remainder of 306.
Record the quotient 6 as the next digit in the result. 
Result so far: 99217.7986
If we take 5274 away from 5580, we end up with 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

On to step 13:
879 can be fit into 3060 3 times, resulting in a remainder of 423.
The number 3 becomes the next digit in our result. 
Result so far: 99217.79863
The remainder is 423 after subtracting 2637 from 3060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4230, and continue the process.

Step 14:
879 goes into 4230 4 times with a remainder of 714.
Write down 4 as next digit of the result. 
Result so far: 99217.798634
If we take 3516 away from 4230, we end up with 714.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7140, and continue the process.

Step 15:
The number 879 fits into 7140 8 times, leaving a remainder of 108.
The number 8 becomes the next digit in our result. 
Result so far: 99217.7986348
Deduct 7032 from 7140 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Advancing to step 16:
1080 divided by 879 is 1 with a remainder of 201.
Put 1 as the next digit of the answer. 
Result so far: 99217.79863481
If we subtract 879 from 1080, we get 201.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2010, and continue the process.

After the division, we end up with 99217.79863481 and a remainder of 2.01e-07.