Let's divide 521408 by 45
Let's see how many times 45 fits into 521408.

On to step 1:
45 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (2) from the dividend, attach it to 5 and continue: 52 / 45

Let's proceed to step 2:
52 divided by 45 is 1 with a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 45 from 52 and we're left with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 45

Advancing to step 3:
45 goes into 71 1 times with a remainder of 26.
Use 1 as the next digit of our solution. 
Result so far: 11.0
If we take 45 away from 71, we end up with 26.
Append the next digit (4) from the dividend to 26 and continue with: 264 / 45

Going ahead to step 4:
264 divided by 45 is 5 with a remainder of 39.
Put 5 as the next digit of the answer. 
Result so far: 115.0
Subtracting 225 from 264 leaves us with 39.
Grab the next digit (0) from the dividend, add it to 39, then carry on: 390 / 45

Let's proceed to step 5:
The number 45 fits into 390 8 times, leaving a remainder of 30.
The next digit of our result is 8. 
Result so far: 1158.0
Deduct 360 from 390 and we're left with 30.
Bring next digit (8) of the dividend behind the 30 and repeat the process: 308 / 45

Advancing to step 6:
If we divide 308 by 45, we get 6 and a remainder of 38.
The next digit of our result is 6. 
Result so far: 11586.0
Subtracting 270 from 308 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Step 7:
If we divide 380 by 45, we get 8 and a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 11586.8
The remainder is 20 after subtracting 360 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 8:
45 goes into 200 4 times with a remainder of 20.
Put 4 as the next digit of the answer. 
Result so far: 11586.84
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
If we divide 200 by 45, we get 4 and a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 11586.844
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 11586.844, and the remainder is 0.002.