You. Suck. At. Maths. Do it step by step, and less Q_Q plax.
Also you and your amerifag shitsigns, can foad and suck my ass literally.
Noone gives a fuck about ur americanshit LB's or Feets, or MP/H. Now get good, use international system.
1,3 = 1 comma 3, aka 1 unity, 3 as decimal.
2x3 = 2...