We look at the division of 921186 by 45 
We want to figure out the number of times 921186 can be divided by 45.

Step 1:
45 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 45

On to step 2:
45 can be fit into 92 2 times, resulting in a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 90 from 92 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 45

Advancing to step 3:
When dividing 21 by 45, we get 0 with a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 20.0
If we take 0 away from 21, we end up with 21.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 45

On to step 4:
The number 45 fits into 211 4 times, leaving a remainder of 31.
Put 4 as the next digit of the answer. 
Result so far: 204.0
If we subtract 180 from 211, we get 31.
Take the next digit (8) from the dividend and append it to 31, then repeat: 318 / 45

Going ahead to step 5:
318 divided by 45 is 7 with a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 2047.0
If we subtract 315 from 318, we get 3.
Take the next digit (6) from the dividend and append it to 3, then repeat: 36 / 45

Step 6:
36 divided by 45 is 0 with a remainder of 36.
The number 0 becomes the next digit in our result. 
Result so far: 20470.0
Subtracting 0 from 36 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 7:
The number 45 fits into 360 8 times, leaving a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 20470.8
Subtracting 360 from 360 leaves us 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 8:
45 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 20470.8
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.

Step 9:
The number 45 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 20470.8
Subtracting 0 from 0 leaves us 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 20470.8 and a remainder of 0.0.