We're dividing 387870 by 1 
We're looking to find how many times 1 goes into 387870.

On to step 1:
The number 1 fits into 3 3 times, leaving a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 3 from 3 leaves us with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

On to step 2:
When dividing 8 by 1, we get 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 38.0
Deduct 8 from 8 and we're left with 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 1

Going ahead to step 3:
1 goes into 7 7 times with a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 387.0
If we subtract 7 from 7, we get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 1

On to step 4:
8 divided by 1 is 8 with a remainder of 0.
Use 8 as the next digit of our solution. 
Result so far: 3878.0
Subtract 8 from 8 to get 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 1

Let's proceed to step 5:
The number 1 fits into 7 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 38787.0
If we subtract 7 from 7, we get 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 1

Going ahead to step 6:
When dividing 0 by 1, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 387870.0
Deduct 0 from 0 and we're left 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.

Moving on to step 7:
When dividing 0 by 1, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 387870.0
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.

Advancing to step 8:
The number 1 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 387870.0
Deduct 0 from 0 and we're left 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.

In conclusion, the division gives 387870.0 with a balance of 0.0.