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.
• $1 \leq A \leq 10^4$
• $1 \leq B \leq 10^4$
• $1 \leq C \leq 10^4$
• $1 \leq D \leq 10^4$

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.

3 5 2 7

15

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

100 600 200 300

60000