We're dividing 840578 by 48 
We want to figure out the number of times 840578 can be divided by 48.

Moving on to step 1:
48 can be fit into 8 0 times, resulting in a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 48

Advancing to step 2:
When dividing 84 by 48, we get 1 with a remainder of 36.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 48 from 84, we get 36.
Bring next digit (0) of the dividend behind the 36 and repeat the process: 360 / 48

On to step 3:
48 goes into 360 7 times with a remainder of 24.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
Subtract 336 from 360 to get 24.
Take the next digit (5) from the dividend and append it to 24, then repeat: 245 / 48

On to step 4:
48 can be fit into 245 5 times, resulting in a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 175.0
Subtracting 240 from 245 leaves us with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 48

Going ahead to step 5:
The number 48 fits into 57 1 times, leaving a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1751.0
If we take 48 away from 57, we end up with 9.
Append the next digit (8) from the dividend to 9 and continue with: 98 / 48

On to step 6:
98 divided by 48 is 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 17512.0
The remainder is 2 after subtracting 96 from 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
20 divided by 48 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 17512.0
Subtract 0 from 20 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.

Moving on to step 8:
48 goes into 200 4 times with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 17512.04
Deduct 192 from 200 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.

Advancing to step 9:
80 divided by 48 is 1 with a remainder of 32.
The number 1 becomes the next digit in our result. 
Result so far: 17512.041
If we subtract 48 from 80, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 10:
If we divide 320 by 48, we get 6 and a remainder of 32.
The number 6 becomes the next digit in our result. 
Result so far: 17512.0416
Deduct 288 from 320 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 11:
When dividing 320 by 48, we get 6 with a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 17512.04166
If we take 288 away from 320, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 17512.04166, with a leftover of 3.2e-05.