import sys

# sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()
dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = (1 << 63)-1
inf = (1 << 31)-1
md = 10**9+7
# md = 998244353

class Vector:
    def __init__(self, x, y, init_x=1, init_y=0):
        self.x = x
        self.y = y
        self.norm2 = x*x+y*y
        self.norm = self.norm2**0.5
        self.zone = 2
        if x == y == 0: self.zone = -1
        elif init_x*y-init_y*x > 0: self.zone = 1
        elif init_x*y-init_y*x < 0: self.zone = 3
        elif init_x*x+init_y*y > 0: self.zone = 0

    def __repr__(self):
        return "({},{})".format(self.x, self.y)

    def __eq__(self, other):
        if self.zone != other.zone: return False
        return self.outer(other) == 0

    def __lt__(self, other):
        if self.zone == other.zone: return self.outer(other) > 0
        return self.zone < other.zone

    def __add__(self, other): return Vector(self.x+other.x, self.y+other.y)

    def __sub__(self, other): return Vector(self.x-other.x, self.y-other.y)

    def __iadd__(self, other):
        self.x += other.x
        self.y += other.y
        return self

    def __isub__(self, other):
        self.x -= other.x
        self.y -= other.y
        return self

    def __neg__(self):
        return Vector(-self.x, -self.y)

    def __mul__(self, val):
        return Vector(val*self.x, val*self.y)

    __rmul__ = __mul__

    def __truediv__(self, val):
        assert val != 0
        return Vector(self.x/val, self.y/val)

    def dot(self, v): return self.x*v.x+self.y*v.y

    def outer(self, v): return self.x*v.y-self.y*v.x

    def rot90(self): return Vector(-self.y, self.x)

def area(polygon):
    res = 0
    for i in range(len(polygon)):
        [x1, y1], [x2, y2] = polygon[i-1], polygon[i]
        res += x1*y2-x2*y1
    return abs(res)

from math import gcd

n = II()
vv = []
for _ in range(n):
    a, b = LI()
    if a == 0 and b == 0: continue
    v = Vector(a, b)
    if v.zone > 1: v = -v
    vv.append(v)

if not vv:
    print(1)
    exit()

vv.sort()
# pDB(vv)
n = len(vv)

s = Vector(0, 0)
pre = [(0, 0)]
for i in range(n):
    s += vv[i]
    pre.append((s.x, s.y))

s = Vector(0, 0)
pos = []
for i in range(n-1, 0, -1):
    s += vv[i]
    pos.append((s.x, s.y))

xy = pre+pos[::-1]
# pDB(xy)

b = 0
for i in range(len(xy)):
    dx = xy[i-1][0]-xy[i][0]
    dy = xy[i-1][1]-xy[i][1]
    b += gcd(dx, dy)
s2 = area(xy)
# pDB(b,s2)

ans = (s2+b+2)//2%md
print(ans)