768451 ÷ 45 
We want to figure out the number of times 768451 can be divided by 45.

Advancing to step 1:
When dividing 7 by 45, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 45

Step 2:
45 can be fit into 76 1 times, resulting in a remainder of 31.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 45 from 76 to get 31.
Bring next digit (8) of the dividend behind the 31 and repeat the process: 318 / 45

Let's proceed to step 3:
The number 45 fits into 318 7 times, leaving a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we take 315 away from 318, we end up with 3.
Fetch the next digit (4) from the dividend, attach it to 3 and continue: 34 / 45

Step 4:
When dividing 34 by 45, we get 0 with a remainder of 34.
The next digit of our result is 0. 
Result so far: 170.0
If we subtract 0 from 34, we get 34.
Append the next digit (5) from the dividend to 34 and continue with: 345 / 45

Moving on to step 5:
When dividing 345 by 45, we get 7 with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 1707.0
If we take 315 away from 345, we end up with 30.
Grab the next digit (1) from the dividend, add it to 30, then carry on: 301 / 45

Advancing to step 6:
301 divided by 45 is 6 with a remainder of 31.
Put 6 as the next digit of the answer. 
Result so far: 17076.0
The remainder is 31 after subtracting 270 from 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Step 7:
310 divided by 45 is 6 with a remainder of 40.
The number 6 becomes the next digit in our result. 
Result so far: 17076.6
If we take 270 away from 310, we end up 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.

Moving on to step 8:
If we divide 400 by 45, we get 8 and a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 17076.68
Deduct 360 from 400 and we're left 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.

Moving on to step 9:
The number 45 fits into 400 8 times, leaving a remainder of 40.
Put 8 as the next digit of the answer. 
Result so far: 17076.688
If we take 360 away from 400, we end up 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.

After the division, we end up with 17076.688 and a remainder of 0.004.