package main

import (
	"fmt"
)

func main() {
	var a, b int
	fmt.Scan(&a, &b)

	fmt.Println(resolve(a, b) % 1000000007)
}

func resolve(a, b int) int {
	if a%2 == b%2 {
		return (a+1)*(b+1) + a*b
	} else {
		return (a+1)*b + a*(b+1)
	}
}