Question

find the energy in kWh consumed by four devices of power 500 w each​

Answer 1

power consumed by 1 device(p)= (500W= 500/1000) kWh= 0.5 k

time used=t

energy consumed by 4 devices= 4*p*t= 4* 0.5*t=  2t kWh

in case you have the value of time(t) just fill the value in place of t and multiply

hope it helps

good day!