When two resistance `R_(1)` and `R_(2)` connected in series and introduced into the left gap of a meter bridge and a resistance of `10Omega` is introduced into the right gap,a null point is found at `60cm` from left side. When `R_(1)` and `R_(2)` are connected in parallel and introduced into the left gap,a resistance of `3Omega` is introduced into the right-gap to get null point at `40cm` from left end.The product of `R_(1)R_(2)` is _______`Omega^2`