Let's divide 1221445 by 879
Let's see how many times 879 fits into 1221445.

Moving on to step 1:
879 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 879

Step 2:
879 can be fit into 12 0 times, resulting in a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Include the next digit (2) from the dividend after 12, then repeat: 122 / 879

On to step 3:
If we divide 122 by 879, we get 0 and a remainder of 122.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 122, we end up with 122.
Include the next digit (1) from the dividend after 122, then repeat: 1221 / 879

Step 4:
879 can be fit into 1221 1 times, resulting in a remainder of 342.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 879 from 1221 and we're left with 342.
Grab the next digit (4) from the dividend, add it to 342, then carry on: 3424 / 879

Going ahead to step 5:
879 goes into 3424 3 times with a remainder of 787.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
Deduct 2637 from 3424 and we're left with 787.
Take the next digit (4) from the dividend and append it to 787, then repeat: 7874 / 879

Advancing to step 6:
879 can be fit into 7874 8 times, resulting in a remainder of 842.
Put 8 as the next digit of the answer. 
Result so far: 138.0
Subtracting 7032 from 7874 leaves us with 842.
Include the next digit (5) from the dividend after 842, then repeat: 8425 / 879

On to step 7:
When dividing 8425 by 879, we get 9 with a remainder of 514.
The next digit of our result is 9. 
Result so far: 1389.0
Subtract 7911 from 8425 to get 514.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

Going ahead to step 8:
When dividing 5140 by 879, we get 5 with a remainder of 745.
The next digit of our result is 5. 
Result so far: 1389.5
Deduct 4395 from 5140 and we're left with 745.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7450, and continue the process.

Let's proceed to step 9:
879 can be fit into 7450 8 times, resulting in a remainder of 418.
Record the quotient 8 as the next digit in the result. 
Result so far: 1389.58
The remainder is 418 after subtracting 7032 from 7450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Moving on to step 10:
When dividing 4180 by 879, we get 4 with a remainder of 664.
Put 4 as the next digit of the answer. 
Result so far: 1389.584
The remainder is 664 after subtracting 3516 from 4180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Advancing to step 11:
6640 divided by 879 is 7 with a remainder of 487.
Put 7 as the next digit of the answer. 
Result so far: 1389.5847
Deduct 6153 from 6640 and we're left with 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

Moving on to step 12:
When dividing 4870 by 879, we get 5 with a remainder of 475.
Write down 5 as next digit of the result. 
Result so far: 1389.58475
Subtracting 4395 from 4870 leaves us with 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

Let's proceed to step 13:
879 can be fit into 4750 5 times, resulting in a remainder of 355.
Write down 5 as next digit of the result. 
Result so far: 1389.584755
If we subtract 4395 from 4750, we get 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

The final outcome is 1389.584755, with a leftover of 3.55e-05.