Part b. Write a **main()** method that reads one integer,
calls **convert(s)**, reads a second integer, calls **convert(t)**, forms
the product of the two integers and assigns it to u and calls **convert(u)**
with the product. Here is a sample output:
type your first string of digits:
12345
You typed 12345
In scientific notation it is:
1.2345 X 10^4
type your second string of digits:
56789
You typed 56789
In scientific notation it is:
5.6789 X 10^4
The product in scientific notation is:
7.01060205 X 10^8

Hand in only the solution to Part b.

Hint: To get your input to appear on the line after the string "type your
first..." end this string with the control character **\n**.