Calculating Runer-Runner In Omaha

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Trying to calculate the probability of hitting a nut low by hitting the turn and the flop. You start w/A-2-3-X and the flop it K-10-8. To hit a nut low, I need to hit two cards cards below and 8 but no more than one of my three low cards. I'm not sure how to calculate that. I know how to figure runner runner nut low if I have A-2-x-x, then the equation is 20/45 x 16/44 = 16.2%. But I think the equation is different if you add another low card to my hand. Need a math wizard for this, I think.

Thanks.