Let's divide 1591638 by 879
We want to figure out the number of times 1591638 can be divided by 879.

Advancing to step 1:
879 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 879

Step 2:
15 divided by 879 is 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 879

On to step 3:
If we divide 159 by 879, we get 0 and a remainder of 159.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 159 to get 159.
Bring next digit (1) of the dividend behind the 159 and repeat the process: 1591 / 879

Going ahead to step 4:
879 goes into 1591 1 times with a remainder of 712.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 879 from 1591 to get 712.
Append the next digit (6) from the dividend to 712 and continue with: 7126 / 879

Advancing to step 5:
879 goes into 7126 8 times with a remainder of 94.
Put 8 as the next digit of the answer. 
Result so far: 18.0
If we subtract 7032 from 7126, we get 94.
Include the next digit (3) from the dividend after 94, then repeat: 943 / 879

On to step 6:
When dividing 943 by 879, we get 1 with a remainder of 64.
The next digit of our result is 1. 
Result so far: 181.0
Subtract 879 from 943 to get 64.
Append the next digit (8) from the dividend to 64 and continue with: 648 / 879

Step 7:
648 divided by 879 is 0 with a remainder of 648.
The number 0 becomes the next digit in our result. 
Result so far: 1810.0
Deduct 0 from 648 and we're left with 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Going ahead to step 8:
The number 879 fits into 6480 7 times, leaving a remainder of 327.
Put 7 as the next digit of the answer. 
Result so far: 1810.7
If we subtract 6153 from 6480, we get 327.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3270, and continue the process.

Step 9:
3270 divided by 879 is 3 with a remainder of 633.
Write down 3 as next digit of the result. 
Result so far: 1810.73
Subtract 2637 from 3270 to get 633.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6330, and continue the process.

Advancing to step 10:
879 can be fit into 6330 7 times, resulting in a remainder of 177.
The number 7 becomes the next digit in our result. 
Result so far: 1810.737
Subtract 6153 from 6330 to get 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

On to step 11:
The number 879 fits into 1770 2 times, leaving a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 1810.7372
If we take 1758 away from 1770, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 12:
When dividing 120 by 879, we get 0 with a remainder of 120.
Write down 0 as next digit of the result. 
Result so far: 1810.7372
If we take 0 away from 120, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 13:
If we divide 1200 by 879, we get 1 and a remainder of 321.
Record the quotient 1 as the next digit in the result. 
Result so far: 1810.737201
If we subtract 879 from 1200, we get 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

On to step 14:
879 goes into 3210 3 times with a remainder of 573.
Write down 3 as next digit of the result. 
Result so far: 1810.7372013
Deduct 2637 from 3210 and we're left with 573.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5730, and continue the process.

Let's proceed to step 15:
5730 divided by 879 is 6 with a remainder of 456.
Record the quotient 6 as the next digit in the result. 
Result so far: 1810.73720136
If we subtract 5274 from 5730, we get 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

After the division, we end up with 1810.73720136 and a remainder of 4.56e-07.