We divide 12957991 by 380
We want to divide 12957991 by 380.

Moving on to step 1:
The number 380 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 380

Moving on to step 2:
When dividing 12 by 380, we get 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 380

Advancing to step 3:
The number 380 fits into 129 0 times, leaving a remainder of 129.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 129 leaves us with 129.
Append the next digit (5) from the dividend to 129 and continue with: 1295 / 380

Let's proceed to step 4:
1295 divided by 380 is 3 with a remainder of 155.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 1140 from 1295 and we're left with 155.
Grab the next digit (7) from the dividend, add it to 155, then carry on: 1557 / 380

Step 5:
380 goes into 1557 4 times with a remainder of 37.
Put 4 as the next digit of the answer. 
Result so far: 34.0
Subtract 1520 from 1557 to get 37.
Append the next digit (9) from the dividend to 37 and continue with: 379 / 380

Going ahead to step 6:
379 divided by 380 is 0 with a remainder of 379.
Put 0 as the next digit of the answer. 
Result so far: 340.0
Deduct 0 from 379 and we're left with 379.
Bring next digit (9) of the dividend behind the 379 and repeat the process: 3799 / 380

On to step 7:
When dividing 3799 by 380, we get 9 with a remainder of 379.
Use 9 as the next digit of our solution. 
Result so far: 3409.0
Subtracting 3420 from 3799 leaves us with 379.
Take the next digit (1) from the dividend and append it to 379, then repeat: 3791 / 380

Moving on to step 8:
When dividing 3791 by 380, we get 9 with a remainder of 371.
Write down 9 as next digit of the result. 
Result so far: 34099.0
Subtracting 3420 from 3791 leaves us with 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Let's proceed to step 9:
380 goes into 3710 9 times with a remainder of 290.
The number 9 becomes the next digit in our result. 
Result so far: 34099.9
If we take 3420 away from 3710, we end up with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Going ahead to step 10:
The number 380 fits into 2900 7 times, leaving a remainder of 240.
Write down 7 as next digit of the result. 
Result so far: 34099.97
Subtract 2660 from 2900 to get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Step 11:
380 can be fit into 2400 6 times, resulting in a remainder of 120.
Record the quotient 6 as the next digit in the result. 
Result so far: 34099.976
Deduct 2280 from 2400 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Moving on to step 12:
380 can be fit into 1200 3 times, resulting in a remainder of 60.
Use 3 as the next digit of our solution. 
Result so far: 34099.9763
Deduct 1140 from 1200 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 13:
The number 380 fits into 600 1 times, leaving a remainder of 220.
Record the quotient 1 as the next digit in the result. 
Result so far: 34099.97631
Deduct 380 from 600 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 14:
380 goes into 2200 5 times with a remainder of 300.
Use 5 as the next digit of our solution. 
Result so far: 34099.976315
Subtract 1900 from 2200 to get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 15:
3000 divided by 380 is 7 with a remainder of 340.
Record the quotient 7 as the next digit in the result. 
Result so far: 34099.9763157
Subtract 2660 from 3000 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Advancing to step 16:
380 goes into 3400 8 times with a remainder of 360.
The next digit of our result is 8. 
Result so far: 34099.97631578
The remainder is 360 after subtracting 3040 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

In conclusion, the division gives 34099.97631578 with a balance of 3.6e-07.