We look at the division of 12937390 by 2 
We want to divide 12937390 by 2.

Step 1:
2 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 2

On to step 2:
If we divide 12 by 2, we get 6 and a remainder of 0.
The next digit of our result is 6. 
Result so far: 6.0
The remainder is 0 after subtracting 12 from 12.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 2

Let's proceed to step 3:
If we divide 9 by 2, we get 4 and a remainder of 1.
The next digit of our result is 4. 
Result so far: 64.0
The remainder is 1 after subtracting 8 from 9.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 2

Let's proceed to step 4:
When dividing 13 by 2, we get 6 with a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 646.0
The remainder is 1 after subtracting 12 from 13.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 2

Moving on to step 5:
If we divide 17 by 2, we get 8 and a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 6468.0
Subtract 16 from 17 to get 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 2

Advancing to step 6:
If we divide 13 by 2, we get 6 and a remainder of 1.
Use 6 as the next digit of our solution. 
Result so far: 64686.0
Deduct 12 from 13 and we're left with 1.
Take the next digit (9) from the dividend and append it to 1, then repeat: 19 / 2

Advancing to step 7:
19 divided by 2 is 9 with a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 646869.0
Deduct 18 from 19 and we're left with 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 2

Step 8:
The number 2 fits into 10 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 6468695.0
If we take 10 away from 10, 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 9:
When dividing 0 by 2, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 6468695.0
If we take 0 away from 0, 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 10:
2 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 6468695.0
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.

In conclusion, the division gives 6468695.0 with a balance of 0.0.