12948116 ÷ 345 
Let's see how many times 345 fits into 12948116.

Advancing to step 1:
345 goes into 1 0 times with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 345

Going ahead to step 2:
The number 345 fits into 12 0 times, leaving 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.
Take the next digit (9) from the dividend and append it to 12, then repeat: 129 / 345

Going ahead to step 3:
If we divide 129 by 345, we get 0 and a remainder of 129.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 129 to get 129.
Include the next digit (4) from the dividend after 129, then repeat: 1294 / 345

Going ahead to step 4:
The number 345 fits into 1294 3 times, leaving a remainder of 259.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 1035 from 1294 and we're left with 259.
Append the next digit (8) from the dividend to 259 and continue with: 2598 / 345

Moving on to step 5:
When dividing 2598 by 345, we get 7 with a remainder of 183.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
If we take 2415 away from 2598, we end up with 183.
Include the next digit (1) from the dividend after 183, then repeat: 1831 / 345

Let's proceed to step 6:
1831 divided by 345 is 5 with a remainder of 106.
Put 5 as the next digit of the answer. 
Result so far: 375.0
Deduct 1725 from 1831 and we're left with 106.
Include the next digit (1) from the dividend after 106, then repeat: 1061 / 345

Advancing to step 7:
345 goes into 1061 3 times with a remainder of 26.
Put 3 as the next digit of the answer. 
Result so far: 3753.0
Deduct 1035 from 1061 and we're left with 26.
Append the next digit (6) from the dividend to 26 and continue with: 266 / 345

Let's proceed to step 8:
266 divided by 345 is 0 with a remainder of 266.
Record the quotient 0 as the next digit in the result. 
Result so far: 37530.0
Subtract 0 from 266 to get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

On to step 9:
If we divide 2660 by 345, we get 7 and a remainder of 245.
Record the quotient 7 as the next digit in the result. 
Result so far: 37530.7
The remainder is 245 after subtracting 2415 from 2660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Moving on to step 10:
The number 345 fits into 2450 7 times, leaving a remainder of 35.
The next digit of our result is 7. 
Result so far: 37530.77
Deduct 2415 from 2450 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

The final outcome is 37530.77, with a leftover of 0.035.