We divide 48509410 by 12
We want to figure out the number of times 48509410 can be divided by 12.

Going ahead to step 1:
The number 12 fits into 4 0 times, leaving a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 12

Advancing to step 2:
12 goes into 48 4 times with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 48 from 48 to get 0.
Include the next digit (5) from the dividend after 0, then repeat: 5 / 12

Going ahead to step 3:
If we divide 5 by 12, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 40.0
If we subtract 0 from 5, we get 5.
Grab the next digit (0) from the dividend, add it to 5, then carry on: 50 / 12

Let's proceed to step 4:
12 goes into 50 4 times with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 404.0
Subtracting 48 from 50 leaves us with 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 12

Step 5:
The number 12 fits into 29 2 times, leaving a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 4042.0
If we take 24 away from 29, we end up with 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 12

Advancing to step 6:
12 can be fit into 54 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 40424.0
Subtract 48 from 54 to get 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 12

Step 7:
When dividing 61 by 12, we get 5 with a remainder of 1.
Use 5 as the next digit of our solution. 
Result so far: 404245.0
The remainder is 1 after subtracting 60 from 61.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 12

Advancing to step 8:
The number 12 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 4042450.0
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.

On to step 9:
The number 12 fits into 100 8 times, leaving a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 4042450.8
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.

Advancing to step 10:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 4042450.83
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.

Going ahead to step 11:
12 can be fit into 40 3 times, resulting in a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 4042450.833
Subtract 36 from 40 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.

The final result is 4042450.833 with a remainder of 0.0004.