580103 divided by 45 
We want to figure out the number of times 580103 can be divided by 45.

Going ahead to step 1:
45 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 45

Advancing to step 2:
45 goes into 58 1 times with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 45 from 58 and we're left with 13.
Fetch the next digit (0) from the dividend, attach it to 13 and continue: 130 / 45

Advancing to step 3:
The number 45 fits into 130 2 times, leaving a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtract 90 from 130 to get 40.
Include the next digit (1) from the dividend after 40, then repeat: 401 / 45

On to step 4:
45 can be fit into 401 8 times, resulting in a remainder of 41.
Put 8 as the next digit of the answer. 
Result so far: 128.0
Subtract 360 from 401 to get 41.
Take the next digit (0) from the dividend and append it to 41, then repeat: 410 / 45

Going ahead to step 5:
45 can be fit into 410 9 times, resulting in a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 1289.0
The remainder is 5 after subtracting 405 from 410.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 45

On to step 6:
53 divided by 45 is 1 with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 12891.0
Deduct 45 from 53 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 7:
The number 45 fits into 80 1 times, leaving a remainder of 35.
The number 1 becomes the next digit in our result. 
Result so far: 12891.1
If we take 45 away from 80, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

On to step 8:
The number 45 fits into 350 7 times, leaving a remainder of 35.
Write down 7 as next digit of the result. 
Result so far: 12891.17
Subtracting 315 from 350 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 9:
45 goes into 350 7 times with a remainder of 35.
Put 7 as the next digit of the answer. 
Result so far: 12891.177
Deduct 315 from 350 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

After the division, we end up with 12891.177 and a remainder of 0.0035.