We look at the division of 139584 by 45 
We want to divide 139584 by 45.

On to step 1:
The number 45 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (3) from the dividend after 1, then repeat: 13 / 45

Let's proceed to step 2:
45 can be fit into 13 0 times, resulting in a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 13 to get 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 45

Advancing to step 3:
45 goes into 139 3 times with a remainder of 4.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 135 from 139 to get 4.
Append the next digit (5) from the dividend to 4 and continue with: 45 / 45

Advancing to step 4:
If we divide 45 by 45, we get 1 and a remainder of 0.
The next digit of our result is 1. 
Result so far: 31.0
Deduct 45 from 45 and we're left with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 45

Going ahead to step 5:
45 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 310.0
Subtract 0 from 8 to get 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 45

Advancing to step 6:
45 goes into 84 1 times with a remainder of 39.
The number 1 becomes the next digit in our result. 
Result so far: 3101.0
If we subtract 45 from 84, we get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 7:
When dividing 390 by 45, we get 8 with a remainder of 30.
The number 8 becomes the next digit in our result. 
Result so far: 3101.8
If we take 360 away from 390, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 8:
45 goes into 300 6 times with a remainder of 30.
The next digit of our result is 6. 
Result so far: 3101.86
Deduct 270 from 300 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
When dividing 300 by 45, we get 6 with a remainder of 30.
Use 6 as the next digit of our solution. 
Result so far: 3101.866
The remainder is 30 after subtracting 270 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 3101.866 with a remaining 0.003.