We're dividing 445761 by 90 
We want to figure out the number of times 445761 can be divided by 90.

Going ahead to step 1:
When dividing 4 by 90, we get 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 90

On to step 2:
90 goes into 44 0 times with a remainder of 44.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 44 and we're left with 44.
Append the next digit (5) from the dividend to 44 and continue with: 445 / 90

Going ahead to step 3:
If we divide 445 by 90, we get 4 and a remainder of 85.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 360 from 445, we get 85.
Fetch the next digit (7) from the dividend, attach it to 85 and continue: 857 / 90

Moving on to step 4:
857 divided by 90 is 9 with a remainder of 47.
Use 9 as the next digit of our solution. 
Result so far: 49.0
Deduct 810 from 857 and we're left with 47.
Grab the next digit (6) from the dividend, add it to 47, then carry on: 476 / 90

Going ahead to step 5:
The number 90 fits into 476 5 times, leaving a remainder of 26.
The next digit of our result is 5. 
Result so far: 495.0
Subtract 450 from 476 to get 26.
Fetch the next digit (1) from the dividend, attach it to 26 and continue: 261 / 90

Going ahead to step 6:
The number 90 fits into 261 2 times, leaving a remainder of 81.
The number 2 becomes the next digit in our result. 
Result so far: 4952.0
If we subtract 180 from 261, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

On to step 7:
90 goes into 810 9 times with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 4952.9
Deduct 810 from 810 and we're left with 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 90, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 4952.9
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
90 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 4952.9
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.

The final result is 4952.9 with a remainder of 0.0.