What is 3.18 kg in pounds?
Since 1 kg = 2.20462 lb, set up a conversion:
3.18kg * (2.20462 lb/1kg)
= $${\mathtt{3.18}}{\mathtt{\,\times\,}}{\mathtt{2.204\: \!62}} = {\mathtt{7.010\: \!691\: \!6}}$$
~ 7.01 lb