Scientific notation is a better way of writing a very large or very small number, instead of writing every numbers, we can write only the numbers between 1 and 10 followed by "*10 raised to some power", as we have in our question:
7.296 * 10^2 is equal to 729.6
Calculating the numbers in our question we will have as result:
7.296*10^2/9.6*10^-9 = 7.6*10^10
