This math problem can be easily solved:
- Do the numerator first.
(4000x10^-23)(0.00035x10^15) = 0.000000014
2. Then do the denominator.
5000x10^5 = 500000000
3. Divide.
0.000000014/50000000 = 0.00000000000000028
Your final answer is 0.00000000000000028.
I will ask CPhill for confirmation though.