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53+53+53+53+53+53=318
if you add 53 six times you get 318

stekitty
   1
   53
     6  
-------
   318

do 6*3 first. that is 18, so you write 8 in the 1s spot and carry the one. you then do 6*5 which is 30. add the one from 18. you then get 318.

Hope this helps!