What I don't get is the comparison to gas though. Like how can burning natural gas to generate electricity then using that electricity on a separate device be m

What I don't get is the comparison to gas though. Like how can burning natural gas to generate electricity then using that electricity on a separate device be more efficent than just burning the natural gas directly for heat. The essential output of natural gas is heat to generate electricity if the heat pump were 4x efficient then could a natural gas plant generate electricity, run a giant heat pump and then use the heat to generate 4x more electricity?