We look at the division of 78589290 by 1 
We're looking to find how many times 1 goes into 78589290.

Step 1:
The number 1 fits into 7 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 7.0
If we take 7 away from 7, we end up with 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 1

On to step 2:
8 divided by 1 is 8 with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 78.0
If we take 8 away from 8, we end up with 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 1

Let's proceed to step 3:
1 goes into 5 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 785.0
Deduct 5 from 5 and we're left with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 1

Let's proceed to step 4:
If we divide 8 by 1, we get 8 and a remainder of 0.
The next digit of our result is 8. 
Result so far: 7858.0
The remainder is 0 after subtracting 8 from 8.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 1

Moving on to step 5:
The number 1 fits into 9 9 times, leaving a remainder of 0.
Record the quotient 9 as the next digit in the result. 
Result so far: 78589.0
Subtracting 9 from 9 leaves us with 0.
Include the next digit (2) from the dividend after 0, then repeat: 2 / 1

Advancing to step 6:
The number 1 fits into 2 2 times, leaving a remainder of 0.
The next digit of our result is 2. 
Result so far: 785892.0
Deduct 2 from 2 and we're left with 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 1

Let's proceed to step 7:
9 divided by 1 is 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 7858929.0
Subtract 9 from 9 to get 0.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 1

Let's proceed to step 8:
0 divided by 1 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 78589290.0
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.

Let's proceed to step 9:
0 divided by 1 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 78589290.0
Subtract 0 from 0 to get 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:
1 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 78589290.0
Subtract 0 from 0 to get 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 78589290.0, with a leftover of 0.0.