Math Fun

Submitted by Bill St. Clair on Fri, 2003-01-31 03:25.
by Bill St. Clair

Joe, who works in the office next to mine, pointed out this neat math trick:

111,111,111 x 111,111,111 = 12,345,678,987,654,321

I noticed that the easy way to see this is to do the multiplication the way I learned in third grade:

         111111111
       x 111111111
         ---------
         111111111
        111111111
       111111111
      111111111
     111111111
    111111111
   111111111
  111111111
 111111111
 -----------------
 12345678987654321