We look at the division of 73890408 by 8 
We want to figure out the number of times 73890408 can be divided by 8.

Advancing to step 1:
If we divide 7 by 8, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 8

On to step 2:
8 can be fit into 73 9 times, resulting in a remainder of 1.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 72 from 73, we get 1.
Bring next digit (8) of the dividend behind the 1 and repeat the process: 18 / 8

Going ahead to step 3:
18 divided by 8 is 2 with a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
If we subtract 16 from 18, we get 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 8

Moving on to step 4:
8 goes into 29 3 times with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 923.0
Subtract 24 from 29 to get 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 8

Moving on to step 5:
The number 8 fits into 50 6 times, leaving a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 9236.0
Subtract 48 from 50 to get 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 8

Moving on to step 6:
24 divided by 8 is 3 with a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 92363.0
The remainder is 0 after subtracting 24 from 24.
Bring next digit (0) of the dividend behind the 0 and repeat the process: 0 / 8

Moving on to step 7:
When dividing 0 by 8, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 923630.0
The remainder is 0 after subtracting 0 from 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 8

Moving on to step 8:
8 divided by 8 is 1 with a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 9236301.0
Subtract 8 from 8 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.

Advancing to step 9:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 9236301.0
If we take 0 away from 0, we end up 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 10:
The number 8 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 9236301.0
The remainder is 0 after subtracting 0 from 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 9236301.0, with a leftover of 0.0.