We're dividing 45108307 by 378 
We want to figure out the number of times 45108307 can be divided by 378.

Moving on to step 1:
If we divide 4 by 378, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 378

On to step 2:
If we divide 45 by 378, we get 0 and a remainder of 45.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Bring next digit (1) of the dividend behind the 45 and repeat the process: 451 / 378

Let's proceed to step 3:
The number 378 fits into 451 1 times, leaving a remainder of 73.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 378 away from 451, we end up with 73.
Bring next digit (0) of the dividend behind the 73 and repeat the process: 730 / 378

Let's proceed to step 4:
The number 378 fits into 730 1 times, leaving a remainder of 352.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 352 after subtracting 378 from 730.
Fetch the next digit (8) from the dividend, attach it to 352 and continue: 3528 / 378

Going ahead to step 5:
If we divide 3528 by 378, we get 9 and a remainder of 126.
Record the quotient 9 as the next digit in the result. 
Result so far: 119.0
If we take 3402 away from 3528, we end up with 126.
Bring next digit (3) of the dividend behind the 126 and repeat the process: 1263 / 378

Step 6:
When dividing 1263 by 378, we get 3 with a remainder of 129.
Write down 3 as next digit of the result. 
Result so far: 1193.0
If we subtract 1134 from 1263, we get 129.
Append the next digit (0) from the dividend to 129 and continue with: 1290 / 378

Step 7:
If we divide 1290 by 378, we get 3 and a remainder of 156.
The next digit of our result is 3. 
Result so far: 11933.0
If we take 1134 away from 1290, we end up with 156.
Grab the next digit (7) from the dividend, add it to 156, then carry on: 1567 / 378

Going ahead to step 8:
The number 378 fits into 1567 4 times, leaving a remainder of 55.
The number 4 becomes the next digit in our result. 
Result so far: 119334.0
Subtracting 1512 from 1567 leaves us with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Step 9:
When dividing 550 by 378, we get 1 with a remainder of 172.
Record the quotient 1 as the next digit in the result. 
Result so far: 119334.1
Subtract 378 from 550 to get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 10:
The number 378 fits into 1720 4 times, leaving a remainder of 208.
The number 4 becomes the next digit in our result. 
Result so far: 119334.14
If we take 1512 away from 1720, we end up with 208.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2080, and continue the process.

Advancing to step 11:
When dividing 2080 by 378, we get 5 with a remainder of 190.
Put 5 as the next digit of the answer. 
Result so far: 119334.145
If we subtract 1890 from 2080, we get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Moving on to step 12:
378 can be fit into 1900 5 times, resulting in a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 119334.1455
The remainder is 10 after subtracting 1890 from 1900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 119334.1455, with a leftover of 0.0001.