512691 ÷ 45 
Our goal is to divide 512691 by 45.

On to step 1:
45 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (1) from the dividend after 5, then repeat: 51 / 45

Advancing to step 2:
51 divided by 45 is 1 with a remainder of 6.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 45 from 51 to get 6.
Bring next digit (2) of the dividend behind the 6 and repeat the process: 62 / 45

Advancing to step 3:
If we divide 62 by 45, we get 1 and a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 11.0
Deduct 45 from 62 and we're left with 17.
Fetch the next digit (6) from the dividend, attach it to 17 and continue: 176 / 45

Advancing to step 4:
45 goes into 176 3 times with a remainder of 41.
Write down 3 as next digit of the result. 
Result so far: 113.0
Subtracting 135 from 176 leaves us with 41.
Append the next digit (9) from the dividend to 41 and continue with: 419 / 45

Step 5:
45 goes into 419 9 times with a remainder of 14.
The next digit of our result is 9. 
Result so far: 1139.0
Deduct 405 from 419 and we're left with 14.
Include the next digit (1) from the dividend after 14, then repeat: 141 / 45

Let's proceed to step 6:
The number 45 fits into 141 3 times, leaving a remainder of 6.
Use 3 as the next digit of our solution. 
Result so far: 11393.0
If we subtract 135 from 141, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Step 7:
When dividing 60 by 45, we get 1 with a remainder of 15.
The next digit of our result is 1. 
Result so far: 11393.1
Subtracting 45 from 60 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 8:
150 divided by 45 is 3 with a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 11393.13
If we subtract 135 from 150, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 9:
45 goes into 150 3 times with a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 11393.133
If we take 135 away from 150, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 11393.133, with a leftover of 0.0015.