We look at the division of 37139854 by 12 
We want to divide 37139854 by 12.

Step 1:
12 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (7) from the dividend, add it to 3, then carry on: 37 / 12

Advancing to step 2:
37 divided by 12 is 3 with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 36 from 37, we get 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 12

Going ahead to step 3:
The number 12 fits into 11 0 times, leaving a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
The remainder is 11 after subtracting 0 from 11.
Append the next digit (3) from the dividend to 11 and continue with: 113 / 12

On to step 4:
If we divide 113 by 12, we get 9 and a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 309.0
If we subtract 108 from 113, we get 5.
Grab the next digit (9) from the dividend, add it to 5, then carry on: 59 / 12

Let's proceed to step 5:
When dividing 59 by 12, we get 4 with a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 3094.0
If we take 48 away from 59, we end up with 11.
Fetch the next digit (8) from the dividend, attach it to 11 and continue: 118 / 12

Let's proceed to step 6:
118 divided by 12 is 9 with a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 30949.0
The remainder is 10 after subtracting 108 from 118.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 12

Moving on to step 7:
When dividing 105 by 12, we get 8 with a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 309498.0
The remainder is 9 after subtracting 96 from 105.
Append the next digit (4) from the dividend to 9 and continue with: 94 / 12

Step 8:
When dividing 94 by 12, we get 7 with a remainder of 10.
Write down 7 as next digit of the result. 
Result so far: 3094987.0
If we subtract 84 from 94, we get 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 9:
12 can be fit into 100 8 times, resulting in a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 3094987.8
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.

Moving on to step 10:
If we divide 40 by 12, we get 3 and a remainder of 4.
The next digit of our result is 3. 
Result so far: 3094987.83
If we take 36 away from 40, we end up 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.

Advancing to step 11:
12 goes into 40 3 times with a remainder of 4.
The number 3 becomes the next digit in our result. 
Result so far: 3094987.833
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.

The final result is 3094987.833 with a remainder of 0.0004.