864870 ÷ 48 
We want to figure out the number of times 864870 can be divided by 48.

Advancing to step 1:
48 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 48

Going ahead to step 2:
If we divide 86 by 48, we get 1 and a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 38 after subtracting 48 from 86.
Fetch the next digit (4) from the dividend, attach it to 38 and continue: 384 / 48

Moving on to step 3:
48 goes into 384 8 times with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Deduct 384 from 384 and we're left with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 48

On to step 4:
48 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 180.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 48

On to step 5:
If we divide 87 by 48, we get 1 and a remainder of 39.
Put 1 as the next digit of the answer. 
Result so far: 1801.0
If we take 48 away from 87, we end up with 39.
Take the next digit (0) from the dividend and append it to 39, then repeat: 390 / 48

On to step 6:
If we divide 390 by 48, we get 8 and a remainder of 6.
Put 8 as the next digit of the answer. 
Result so far: 18018.0
Deduct 384 from 390 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 7:
If we divide 60 by 48, we get 1 and a remainder of 12.
Use 1 as the next digit of our solution. 
Result so far: 18018.1
Subtracting 48 from 60 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 8:
When dividing 120 by 48, we get 2 with a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 18018.12
Subtract 96 from 120 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 9:
When dividing 240 by 48, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 18018.125
If we take 240 away from 240, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
When dividing 0 by 48, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 18018.125
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 11:
0 divided by 48 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 18018.125
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 18018.125, with a leftover of 0.0.