We look at the division of 906138 by 45 
We want to figure out the number of times 906138 can be divided by 45.

Step 1:
9 divided by 45 is 0 with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 45

Advancing to step 2:
The number 45 fits into 90 2 times, leaving a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 90 from 90, we get 0.
Bring next digit (6) of the dividend behind the 0 and repeat the process: 6 / 45

Moving on to step 3:
The number 45 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 45

Step 4:
45 can be fit into 61 1 times, resulting in a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 201.0
Deduct 45 from 61 and we're left with 16.
Grab the next digit (3) from the dividend, add it to 16, then carry on: 163 / 45

Advancing to step 5:
If we divide 163 by 45, we get 3 and a remainder of 28.
The next digit of our result is 3. 
Result so far: 2013.0
If we subtract 135 from 163, we get 28.
Bring next digit (8) of the dividend behind the 28 and repeat the process: 288 / 45

Let's proceed to step 6:
When dividing 288 by 45, we get 6 with a remainder of 18.
Record the quotient 6 as the next digit in the result. 
Result so far: 20136.0
If we take 270 away from 288, we end up with 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.
Write down 4 as next digit of the result. 
Result so far: 20136.4
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.

Going ahead to step 8:
The number 45 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 20136.4
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.

Let's proceed to step 9:
0 divided by 45 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 20136.4
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.

After the division, we end up with 20136.4 and a remainder of 0.0.