400259 ÷ 45 
We want to divide 400259 by 45.

Step 1:
If we divide 4 by 45, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 45

Let's proceed to step 2:
If we divide 40 by 45, we get 0 and a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 40, we end up with 40.
Append the next digit (0) from the dividend to 40 and continue with: 400 / 45

Going ahead to step 3:
45 goes into 400 8 times with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Deduct 360 from 400 and we're left with 40.
Include the next digit (2) from the dividend after 40, then repeat: 402 / 45

Step 4:
When dividing 402 by 45, we get 8 with a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 88.0
Deduct 360 from 402 and we're left with 42.
Grab the next digit (5) from the dividend, add it to 42, then carry on: 425 / 45

Step 5:
425 divided by 45 is 9 with a remainder of 20.
The number 9 becomes the next digit in our result. 
Result so far: 889.0
Subtract 405 from 425 to get 20.
Bring next digit (9) of the dividend behind the 20 and repeat the process: 209 / 45

Advancing to step 6:
When dividing 209 by 45, we get 4 with a remainder of 29.
Put 4 as the next digit of the answer. 
Result so far: 8894.0
Subtracting 180 from 209 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Moving on to step 7:
The number 45 fits into 290 6 times, leaving a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 8894.6
Subtracting 270 from 290 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
If we divide 200 by 45, we get 4 and a remainder of 20.
The next digit of our result is 4. 
Result so far: 8894.64
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
45 can be fit into 200 4 times, resulting in a remainder of 20.
Write down 4 as next digit of the result. 
Result so far: 8894.644
Deduct 180 from 200 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 8894.644, with a leftover of 0.002.