859434 ÷ 12 
We're looking to find how many times 12 goes into 859434.

Let's proceed to step 1:
12 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 12

Advancing to step 2:
If we divide 85 by 12, we get 7 and a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 7.0
The remainder is 1 after subtracting 84 from 85.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 12

Let's proceed to step 3:
If we divide 19 by 12, we get 1 and a remainder of 7.
The next digit of our result is 1. 
Result so far: 71.0
The remainder is 7 after subtracting 12 from 19.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 12

On to step 4:
12 goes into 74 6 times with a remainder of 2.
The next digit of our result is 6. 
Result so far: 716.0
If we subtract 72 from 74, we get 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 12

Moving on to step 5:
12 goes into 23 1 times with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 7161.0
If we subtract 12 from 23, we get 11.
Append the next digit (4) from the dividend to 11 and continue with: 114 / 12

Going ahead to step 6:
The number 12 fits into 114 9 times, leaving a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 71619.0
The remainder is 6 after subtracting 108 from 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
12 can be fit into 60 5 times, resulting in a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 71619.5
If we take 60 away from 60, we end up 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.

Advancing to step 8:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 71619.5
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.

Going ahead to step 9:
When dividing 0 by 12, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 71619.5
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.

The final result is 71619.5 with a remainder of 0.0.