We're dividing 15420305 by 9 
We're looking to find how many times 9 goes into 15420305.

On to step 1:
When dividing 1 by 9, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 9

Let's proceed to step 2:
15 divided by 9 is 1 with a remainder of 6.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 9 from 15 leaves us with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 9

Advancing to step 3:
64 divided by 9 is 7 with a remainder of 1.
Use 7 as the next digit of our solution. 
Result so far: 17.0
If we take 63 away from 64, we end up with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 9

Step 4:
When dividing 12 by 9, we get 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 171.0
Subtract 9 from 12 to get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 9

On to step 5:
If we divide 30 by 9, we get 3 and a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 1713.0
Subtracting 27 from 30 leaves us with 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 9

On to step 6:
When dividing 33 by 9, we get 3 with a remainder of 6.
Write down 3 as next digit of the result. 
Result so far: 17133.0
Deduct 27 from 33 and we're left with 6.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 9

Going ahead to step 7:
9 goes into 60 6 times with a remainder of 6.
The next digit of our result is 6. 
Result so far: 171336.0
Subtract 54 from 60 to get 6.
Fetch the next digit (5) from the dividend, attach it to 6 and continue: 65 / 9

Moving on to step 8:
9 goes into 65 7 times with a remainder of 2.
The next digit of our result is 7. 
Result so far: 1713367.0
Subtracting 63 from 65 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
9 can be fit into 20 2 times, resulting in a remainder of 2.
The next digit of our result is 2. 
Result so far: 1713367.2
The remainder is 2 after subtracting 18 from 20.
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 10:
9 can be fit into 20 2 times, resulting in a remainder of 2.
The next digit of our result is 2. 
Result so far: 1713367.22
Subtract 18 from 20 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 1713367.22 with a remainder of 0.002.