59158839 divided by 12 
Let's see how many times 12 fits into 59158839.

Going ahead to step 1:
12 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 12

On to step 2:
59 divided by 12 is 4 with a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 48 from 59, we get 11.
Fetch the next digit (1) from the dividend, attach it to 11 and continue: 111 / 12

Moving on to step 3:
111 divided by 12 is 9 with a remainder of 3.
The number 9 becomes the next digit in our result. 
Result so far: 49.0
Subtract 108 from 111 to get 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 12

Advancing to step 4:
If we divide 35 by 12, we get 2 and a remainder of 11.
The next digit of our result is 2. 
Result so far: 492.0
Subtracting 24 from 35 leaves us with 11.
Grab the next digit (8) from the dividend, add it to 11, then carry on: 118 / 12

On to step 5:
The number 12 fits into 118 9 times, leaving a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 4929.0
If we subtract 108 from 118, we get 10.
Fetch the next digit (8) from the dividend, attach it to 10 and continue: 108 / 12

Let's proceed to step 6:
12 goes into 108 9 times with a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 49299.0
The remainder is 0 after subtracting 108 from 108.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 12

Advancing to step 7:
12 goes into 3 0 times with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 492990.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 12

On to step 8:
If we divide 39 by 12, we get 3 and a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 4929903.0
If we subtract 36 from 39, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
When dividing 30 by 12, we get 2 with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 4929903.2
Subtract 24 from 30 to 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.

Moving on to step 10:
60 divided by 12 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 4929903.25
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.

Let's proceed to step 11:
The number 12 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4929903.25
The remainder is 0 after subtracting 0 from 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 12:
0 divided by 12 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 4929903.25
The remainder is 0 after subtracting 0 from 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 outcome is 4929903.25, with a leftover of 0.0.