664893 ÷ 45 
Our goal is to divide 664893 by 45.

Let's proceed to step 1:
45 can be fit into 6 0 times, resulting in a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 45

Step 2:
45 can be fit into 66 1 times, resulting in a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 45 from 66 and we're left with 21.
Include the next digit (4) from the dividend after 21, then repeat: 214 / 45

Let's proceed to step 3:
45 goes into 214 4 times with a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Subtract 180 from 214 to get 34.
Grab the next digit (8) from the dividend, add it to 34, then carry on: 348 / 45

Advancing to step 4:
When dividing 348 by 45, we get 7 with a remainder of 33.
Write down 7 as next digit of the result. 
Result so far: 147.0
If we take 315 away from 348, we end up with 33.
Take the next digit (9) from the dividend and append it to 33, then repeat: 339 / 45

Going ahead to step 5:
The number 45 fits into 339 7 times, leaving a remainder of 24.
Put 7 as the next digit of the answer. 
Result so far: 1477.0
The remainder is 24 after subtracting 315 from 339.
Take the next digit (3) from the dividend and append it to 24, then repeat: 243 / 45

Let's proceed to step 6:
45 goes into 243 5 times with a remainder of 18.
Write down 5 as next digit of the result. 
Result so far: 14775.0
Subtract 225 from 243 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
180 divided by 45 is 4 with a remainder of 0.
The next digit of our result is 4. 
Result so far: 14775.4
Subtract 180 from 180 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
If we divide 0 by 45, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 14775.4
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
45 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 14775.4
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 14775.4 with a remainder of 0.0.