We're dividing 654586 by 12 
We want to figure out the number of times 654586 can be divided by 12.

On to step 1:
6 divided by 12 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (5) from the dividend and append it to 6, then repeat: 65 / 12

Advancing to step 2:
If we divide 65 by 12, we get 5 and a remainder of 5.
The next digit of our result is 5. 
Result so far: 5.0
Deduct 60 from 65 and we're left with 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 12

Advancing to step 3:
12 goes into 54 4 times with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 54.0
If we take 48 away from 54, we end up with 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 12

Advancing to step 4:
12 can be fit into 65 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 545.0
Subtracting 60 from 65 leaves us with 5.
Include the next digit (8) from the dividend after 5, then repeat: 58 / 12

On to step 5:
12 can be fit into 58 4 times, resulting in a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 5454.0
If we subtract 48 from 58, we get 10.
Grab the next digit (6) from the dividend, add it to 10, then carry on: 106 / 12

Let's proceed to step 6:
12 can be fit into 106 8 times, resulting in a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 54548.0
Subtracting 96 from 106 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 7:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 54548.8
Subtract 96 from 100 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 8:
When dividing 40 by 12, we get 3 with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 54548.83
If we take 36 away from 40, we end up 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.

On to step 9:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Write down 3 as next digit of the result. 
Result so far: 54548.833
Deduct 36 from 40 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.

The quotient of the division is 54548.833, and the remainder is 0.0004.