import sys
from math import gcd
input = sys.stdin.readline
MOD = 10 ** 9 + 7

class Vector2:
    def __init__(self, x: int, y: int):
        self.x = x
        self.y = y

    def __lt__(self, other):
        return area(self, other) > 0

def area(v1: Vector2, v2: Vector2) -> int:
    return v1.x * v2.y - v1.y * v2.x


n = int(input())
vectors = []
for _ in [0] * n:
    x, y = map(int, input().split())
    if(x == 0 and y == 0):
        continue
    if(y < 0):
        x, y = -x, -y
    vectors.append(Vector2(x, y))
vectors.sort()

s, bh = 0, 0
lx, ly = 0, 0
for v in vectors:
    v1 = Vector2(lx, ly)
    v2 = Vector2(lx + v.x, ly + v.y)
    s += area(v1, v2) % MOD
    s %= MOD
    bh += gcd(v.x, v.y)
    bh %= MOD
    lx, ly = v2.x, v2.y

ans = (s + bh + 1) % MOD
print(ans)