problem to calculate some formula between two inputs that entered from the user

Filename	Size	Update
ass1_p1\.cproject	11567	2017-12-03
ass1_p1\.project	785	2017-12-03
ass1_p1\.settings\language.settings.xml	2170	2017-12-03
ass1_p1\.settings\org.eclipse.cdt.managedbuilder.core.prefs	1166	2017-12-03
ass1_p1\Debug\ass1.exe	82119	2017-12-03
ass1_p1\Debug\prob1.o	23839	2017-12-03
ass1_p1\prob1.c	286	2017-12-03
ass1_p1\.settings	0	2017-12-03
ass1_p1\Debug	0	2017-12-03
ass1_p1	0	2017-12-03

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