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Contest: Task: Related: TaskB

Score : $100$ points

Problem Statement

There are two rectangles. The lengths of the vertical sides of the first rectangle are $A$, and the lengths of the horizontal sides of the first rectangle are $B$. The lengths of the vertical sides of the second rectangle are $C$, and the lengths of the horizontal sides of the second rectangle are $D$.

Print the area of the rectangle with the larger area. If the two rectangles have equal areas, print that area.

Constraints

All input values are integers.
$1≤A≤10^4$
$1≤B≤10^4$
$1≤C≤10^4$
$1≤D≤10^4$

Input

The input is given from Standard Input in the following format:

$A$ $B$ $C$ $D$

Output

Print the area of the rectangle with the larger area. If the two rectangles have equal areas, print that area.

Sample Input 1

3 5 2 7

Sample Output 1

The first rectangle has an area of $3×5=15$, and the second rectangle has an area of $2×7=14$. Thus, the output should be $15$, the larger area.

Sample Input 2

100 600 200 300