local function f() return 1, 2, 3 end
local a,b,c = f()
print(a,b,c)
print(string.format("%d/%d", a,b))
local function rate()
  local hits, total, pct = 10, 20, 50
  return hits, total, pct
end
local Hits, Total, Percent = rate()
print(string.format("hit rate %d/%d recent %d%%", Hits, Total, Percent))