Synonyms:

karmana–by work; eva–even; hi–certainly; samsiddhim–perfection; asthitah–situated; janaka-adayah–Janaka and other kings; loka-sangraham–educating the people in general; eva–also; api–for the sake of; sampasyan–by considering; kartum–to act; arhasi–deserve.

Translation:

Even kings like Janaka and others attained the perfectional stage by performance of prescribed duties. Therefore, just for the sake of educating the people in general, you should perform your work.