678343 divided by 45 
Let's see how many times 45 fits into 678343.

Step 1:
If we divide 6 by 45, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 45

Advancing to step 2:
45 can be fit into 67 1 times, resulting in a remainder of 22.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 22 after subtracting 45 from 67.
Fetch the next digit (8) from the dividend, attach it to 22 and continue: 228 / 45

Moving on to step 3:
228 divided by 45 is 5 with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Subtract 225 from 228 to get 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 45

Going ahead to step 4:
The number 45 fits into 33 0 times, leaving a remainder of 33.
Write down 0 as next digit of the result. 
Result so far: 150.0
If we subtract 0 from 33, we get 33.
Include the next digit (4) from the dividend after 33, then repeat: 334 / 45

Advancing to step 5:
If we divide 334 by 45, we get 7 and a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 1507.0
If we take 315 away from 334, we end up with 19.
Bring next digit (3) of the dividend behind the 19 and repeat the process: 193 / 45

Let's proceed to step 6:
The number 45 fits into 193 4 times, leaving a remainder of 13.
The next digit of our result is 4. 
Result so far: 15074.0
Subtracting 180 from 193 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
The number 45 fits into 130 2 times, leaving a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 15074.2
Subtracting 90 from 130 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 8:
400 divided by 45 is 8 with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 15074.28
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
When dividing 400 by 45, we get 8 with a remainder of 40.
Write down 8 as next digit of the result. 
Result so far: 15074.288
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 15074.288 and a remainder of 0.004.