Scientific notation is the way that scientists easily handle very large
numbers or very small numbers. The notation
matches the regular expression [+-][1-9]"."[0-9]+E[+-][0-9]+
which means that the integer portion has exactly one
digit, there is at least one digit in the fractional portion, and the
number and its exponent's signs are always provided
even when they are positive.
Now given a real number A in scientific notation, you are supposed to
print A in the conventional notation while
keeping all the significant figures.