We're dividing 315661 by 12 
We want to figure out the number of times 315661 can be divided by 12.

Going ahead to step 1:
3 divided by 12 is 0 with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 12

On to step 2:
The number 12 fits into 31 2 times, leaving a remainder of 7.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 24 from 31 to get 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 12

Advancing to step 3:
12 can be fit into 75 6 times, resulting in a remainder of 3.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Subtract 72 from 75 to get 3.
Grab the next digit (6) from the dividend, add it to 3, then carry on: 36 / 12

Step 4:
If we divide 36 by 12, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 263.0
Subtracting 36 from 36 leaves us with 0.
Append the next digit (6) from the dividend to 0 and continue with: 6 / 12

Let's proceed to step 5:
12 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 2630.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 12

Advancing to step 6:
12 goes into 61 5 times with a remainder of 1.
The next digit of our result is 5. 
Result so far: 26305.0
Subtract 60 from 61 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 7:
12 can be fit into 10 0 times, resulting in a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 26305.0
Deduct 0 from 10 and we're left 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.

Let's proceed to step 8:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 26305.08
Deduct 96 from 100 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.

Step 9:
If we divide 40 by 12, we get 3 and a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 26305.083
If we subtract 36 from 40, we 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.

Let's proceed to step 10:
40 divided by 12 is 3 with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 26305.0833
Subtracting 36 from 40 leaves us 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.

Our division results in 26305.0833 with a remaining 4e-05.