421687 divided by 8 
Our goal is to divide 421687 by 8.

Let's proceed to step 1:
If we divide 4 by 8, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 8

Let's proceed to step 2:
8 can be fit into 42 5 times, resulting in a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 40 from 42 to get 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 8

Let's proceed to step 3:
21 divided by 8 is 2 with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 52.0
Subtracting 16 from 21 leaves us with 5.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 8

Let's proceed to step 4:
The number 8 fits into 56 7 times, leaving a remainder of 0.
Write down 7 as next digit of the result. 
Result so far: 527.0
Subtract 56 from 56 to get 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 8

Moving on to step 5:
8 goes into 8 1 times with a remainder of 0.
The next digit of our result is 1. 
Result so far: 5271.0
Subtract 8 from 8 to get 0.
Bring next digit (7) of the dividend behind the 0 and repeat the process: 7 / 8

Let's proceed to step 6:
The number 8 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 52710.0
The remainder is 7 after subtracting 0 from 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
8 can be fit into 70 8 times, resulting in a remainder of 6.
Use 8 as the next digit of our solution. 
Result so far: 52710.8
If we subtract 64 from 70, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 8:
When dividing 60 by 8, we get 7 with a remainder of 4.
Record the quotient 7 as the next digit in the result. 
Result so far: 52710.87
Deduct 56 from 60 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 9:
The number 8 fits into 40 5 times, leaving a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 52710.875
Deduct 40 from 40 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 52710.875
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
8 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 52710.875
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 52710.875, and the remainder is 0.0.