from math import gcd
mod = 10**9+7
class Point:
    def __init__(self, px, py):
        self.px = px
        self.py = py

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

def crs(p1, p2):
    return p1.px * p2.py - p1.py * p2.px

N = int(input())
vec = []
for _ in range(N):
    A,B = map(int,input().split())
    if A == 0 and B == 0:
        continue
    if B < 0:
        A *= -1
        B *= -1
    vec.append(Point(A, B))
vec.sort()

EdgePoint = 0
Area = 0
x,y = 0,0
for v in vec:
    a = Point(x, y)
    b = Point(x+v.px, y+v.py)
    Area += crs(a, b)
    Area %= mod
    EdgePoint += gcd(v.px, v.py)
    EdgePoint %= mod
    x = b.px
    y = b.py
print((Area + EdgePoint + 1) % mod)