45311106 ÷ 90 
We're looking to find how many times 90 goes into 45311106.

On to step 1:
4 divided by 90 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Take the next digit (5) from the dividend and append it to 4, then repeat: 45 / 90

On to step 2:
The number 90 fits into 45 0 times, leaving a remainder of 45.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 45 leaves us with 45.
Bring next digit (3) of the dividend behind the 45 and repeat the process: 453 / 90

Let's proceed to step 3:
90 can be fit into 453 5 times, resulting in a remainder of 3.
The next digit of our result is 5. 
Result so far: 5.0
The remainder is 3 after subtracting 450 from 453.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 90

Going ahead to step 4:
If we divide 31 by 90, we get 0 and a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 50.0
Deduct 0 from 31 and we're left with 31.
Bring next digit (1) of the dividend behind the 31 and repeat the process: 311 / 90

Let's proceed to step 5:
90 goes into 311 3 times with a remainder of 41.
Write down 3 as next digit of the result. 
Result so far: 503.0
Subtracting 270 from 311 leaves us with 41.
Append the next digit (1) from the dividend to 41 and continue with: 411 / 90

Advancing to step 6:
If we divide 411 by 90, we get 4 and a remainder of 51.
The next digit of our result is 4. 
Result so far: 5034.0
Subtracting 360 from 411 leaves us with 51.
Append the next digit (0) from the dividend to 51 and continue with: 510 / 90

Advancing to step 7:
If we divide 510 by 90, we get 5 and a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 50345.0
Deduct 450 from 510 and we're left with 60.
Grab the next digit (6) from the dividend, add it to 60, then carry on: 606 / 90

Let's proceed to step 8:
606 divided by 90 is 6 with a remainder of 66.
The number 6 becomes the next digit in our result. 
Result so far: 503456.0
Subtract 540 from 606 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Moving on to step 9:
90 can be fit into 660 7 times, resulting in a remainder of 30.
Use 7 as the next digit of our solution. 
Result so far: 503456.7
If we subtract 630 from 660, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 503456.73
The remainder is 30 after subtracting 270 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 11:
90 can be fit into 300 3 times, resulting in a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 503456.733
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The final result is 503456.733 with a remainder of 0.003.