耕當問奴

if it's plowing, ask the laborer (idiom); when managing a matter, consult the appropriate specialist

variant of 耕[geng1]

to plow / to till

to be / to act as / manage / withstand / when / during / ought / should / match equally / equal / same / obstruct / just at (a time or place) / on the spot / right / just at

at or in the very same... / suitable / adequate / fitting / proper / to replace / to regard as / to think / to pawn / (coll.) to fail (a student)

to ask / to inquire

to ask; to inquire

slave

if it's plowing ask the laborer, if it's weaving ask the maid (idiom); when managing a matter, consult the appropriate specialist