19X19乘法表

http://blog.xuite.net/chengsem/blog/60142870-%E5%8D%B0%E5%BA%A619x19%E4%B9%98%E6%B3%95~%E8%A1%8D%E7%94%9F%E7%9B%B8%E9%97%9C2%E4%BD%8D%E6%95%B8%E4%B9%98%E6%B3%95...%E6%94%BE%E5%A4%A7%E7%B5%95!