90301393 ÷ 390 
Our goal is to divide 90301393 by 390.

Step 1:
390 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 390

Going ahead to step 2:
390 can be fit into 90 0 times, resulting in a remainder of 90.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Include the next digit (3) from the dividend after 90, then repeat: 903 / 390

Let's proceed to step 3:
The number 390 fits into 903 2 times, leaving a remainder of 123.
The next digit of our result is 2. 
Result so far: 2.0
If we take 780 away from 903, we end up with 123.
Bring next digit (0) of the dividend behind the 123 and repeat the process: 1230 / 390

Going ahead to step 4:
390 can be fit into 1230 3 times, resulting in a remainder of 60.
The next digit of our result is 3. 
Result so far: 23.0
If we subtract 1170 from 1230, we get 60.
Append the next digit (1) from the dividend to 60 and continue with: 601 / 390

Let's proceed to step 5:
When dividing 601 by 390, we get 1 with a remainder of 211.
Put 1 as the next digit of the answer. 
Result so far: 231.0
Subtracting 390 from 601 leaves us with 211.
Take the next digit (3) from the dividend and append it to 211, then repeat: 2113 / 390

Let's proceed to step 6:
390 can be fit into 2113 5 times, resulting in a remainder of 163.
The number 5 becomes the next digit in our result. 
Result so far: 2315.0
Subtract 1950 from 2113 to get 163.
Include the next digit (9) from the dividend after 163, then repeat: 1639 / 390

Step 7:
When dividing 1639 by 390, we get 4 with a remainder of 79.
Write down 4 as next digit of the result. 
Result so far: 23154.0
Subtract 1560 from 1639 to get 79.
Take the next digit (3) from the dividend and append it to 79, then repeat: 793 / 390

Let's proceed to step 8:
390 goes into 793 2 times with a remainder of 13.
Put 2 as the next digit of the answer. 
Result so far: 231542.0
Subtract 780 from 793 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 9:
390 can be fit into 130 0 times, resulting in a remainder of 130.
The next digit of our result is 0. 
Result so far: 231542.0
If we take 0 away from 130, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 10:
When dividing 1300 by 390, we get 3 with a remainder of 130.
Put 3 as the next digit of the answer. 
Result so far: 231542.03
If we take 1170 away from 1300, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Advancing to step 11:
1300 divided by 390 is 3 with a remainder of 130.
The next digit of our result is 3. 
Result so far: 231542.033
If we subtract 1170 from 1300, we get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

In conclusion, the division gives 231542.033 with a balance of 0.013.