417878 ÷ 90 
Our goal is to divide 417878 by 90.

Moving on to step 1:
4 divided by 90 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (1) from the dividend, add it to 4, then carry on: 41 / 90

Going ahead to step 2:
90 goes into 41 0 times with a remainder of 41.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 41 leaves us with 41.
Grab the next digit (7) from the dividend, add it to 41, then carry on: 417 / 90

Moving on to step 3:
90 goes into 417 4 times with a remainder of 57.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we subtract 360 from 417, we get 57.
Take the next digit (8) from the dividend and append it to 57, then repeat: 578 / 90

On to step 4:
If we divide 578 by 90, we get 6 and a remainder of 38.
Write down 6 as next digit of the result. 
Result so far: 46.0
The remainder is 38 after subtracting 540 from 578.
Take the next digit (7) from the dividend and append it to 38, then repeat: 387 / 90

Moving on to step 5:
When dividing 387 by 90, we get 4 with a remainder of 27.
Use 4 as the next digit of our solution. 
Result so far: 464.0
If we take 360 away from 387, we end up with 27.
Take the next digit (8) from the dividend and append it to 27, then repeat: 278 / 90

Step 6:
When dividing 278 by 90, we get 3 with a remainder of 8.
Record the quotient 3 as the next digit in the result. 
Result so far: 4643.0
Subtract 270 from 278 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 7:
90 goes into 80 0 times with a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 4643.0
If we take 0 away from 80, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
When dividing 800 by 90, we get 8 with a remainder of 80.
The next digit of our result is 8. 
Result so far: 4643.08
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 9:
If we divide 800 by 90, we get 8 and a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 4643.088
If we take 720 away from 800, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final result is 4643.088 with a remainder of 0.008.