We divide 161715 by 12
We're looking to find how many times 12 goes into 161715.

Step 1:
The number 12 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (6) from the dividend, add it to 1, then carry on: 16 / 12

Step 2:
12 can be fit into 16 1 times, resulting in a remainder of 4.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 12 from 16 leaves us with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 12

Step 3:
12 goes into 41 3 times with a remainder of 5.
The next digit of our result is 3. 
Result so far: 13.0
If we subtract 36 from 41, we get 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 12

Advancing to step 4:
12 goes into 57 4 times with a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 134.0
Deduct 48 from 57 and we're left with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 12

On to step 5:
12 goes into 91 7 times with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 1347.0
Subtract 84 from 91 to get 7.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 12

Going ahead to step 6:
12 can be fit into 75 6 times, resulting in a remainder of 3.
Use 6 as the next digit of our solution. 
Result so far: 13476.0
If we take 72 away from 75, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
The number 12 fits into 30 2 times, leaving a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 13476.2
Subtracting 24 from 30 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
12 can be fit into 60 5 times, resulting in a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 13476.25
Subtract 60 from 60 to 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.

Step 9:
If we divide 0 by 12, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 13476.25
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.

Advancing to step 10:
If we divide 0 by 12, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 13476.25
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.

Our division results in 13476.25 with a remaining 0.0.