We divide 426391 by 9
We want to figure out the number of times 426391 can be divided by 9.

On to step 1:
If we divide 4 by 9, we get 0 and a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 9

Moving on to step 2:
When dividing 42 by 9, we get 4 with a remainder of 6.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 6 after subtracting 36 from 42.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 9

Moving on to step 3:
9 goes into 66 7 times with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 47.0
If we take 63 away from 66, we end up with 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 9

Let's proceed to step 4:
33 divided by 9 is 3 with a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 473.0
Subtracting 27 from 33 leaves us with 6.
Fetch the next digit (9) from the dividend, attach it to 6 and continue: 69 / 9

Let's proceed to step 5:
9 goes into 69 7 times with a remainder of 6.
The next digit of our result is 7. 
Result so far: 4737.0
If we take 63 away from 69, we end up with 6.
Append the next digit (1) from the dividend to 6 and continue with: 61 / 9

Going ahead to step 6:
61 divided by 9 is 6 with a remainder of 7.
The number 6 becomes the next digit in our result. 
Result so far: 47376.0
If we take 54 away from 61, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
If we divide 70 by 9, we get 7 and a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 47376.7
The remainder is 7 after subtracting 63 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Moving on to step 8:
70 divided by 9 is 7 with a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 47376.77
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final outcome is 47376.77, with a leftover of 0.007.