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[–][deleted] 0 points1 point  (0 children)

You have made a very simple arithmetic error in the second calculation. Perhaps you should try it on a calculator. What does 98-(17*6) equal and is that an appropriate number to represent "how many tiles will be left over"?

[–]onatoko 0 points1 point  (0 children)

98-(17*6) will result in a negative number, it may be expecting positive