Charging correct price?

When heads up in a pot, against a potential draw I usually bet between 1/2 - 2/3 of the pot giving my opponent 3/1 - 2/1 drawing odds. However, I am unsure how much to bet and if this changes against two opponents. In the below example, because there were two opponents BigGromtn's drawing odds significantly improved. I did not take this into account. This coupled with his implied odds (massive) made his calls justifiable, although I believe his initial call on the flop to be slightly dubious but given the implied odds acceptable. My min raise on the flop was absolutely horrible. I realise now that I was just building the pot for the turn improving his drawing odds. However, at the time I was holding the nuts and wanted them to call. What price should you charge 2 opponents, if 2:1 is considered correct against 1 opponent?


PokerStars Game #3396162508: Tournament #16835488, Hold'em No Limit -
Level I (10/20) - 2005/12/21 - 15:24:42 (ET)
Table '16835488 2' Seat #6 is the button
Seat 2: BIGDFROMTN (2990 in chips)
Seat 3: Holdie (1680 in chips)
Seat 4: bcash (1610 in chips)
Seat 5: slick klick (1370 in chips)
Seat 6: la cumbia (1550 in chips)
Seat 7: Stacked07 (1480 in chips)
Seat 8: MsMudPie (1420 in chips)
Seat 9: frankford (1400 in chips)
Stacked07: posts small blind 10
MsMudPie: posts big blind 20
*** HOLE CARDS ***
Dealt to Stacked07 [Ad Ah]
frankford: calls 20
BIGDFROMTN: calls 20
Holdie: folds
bcash: folds
slick klick: folds
la cumbia: folds
Stacked07: raises 40 to 60
MsMudPie: folds
frankford: calls 40
BIGDFROMTN: calls 40
*** FLOP *** [As 9c 7c]
Stacked07: bets 100
frankford: raises 100 to 200
BIGDFROMTN: calls 200
Stacked07: raises 200 to 400
frankford: calls 200
BIGDFROMTN: calls 200
*** TURN *** [As 9c 7c] [2d]
Stacked07: checks
frankford: bets 340
BIGDFROMTN: calls 340
Stacked07: raises 680 to 1020 and is all-in
frankford: calls 600 and is all-in
BIGDFROMTN: calls 680
*** RIVER *** [As 9c 7c 2d] [5c]
*** SHOW DOWN ***
Stacked07: shows [Ad Ah] (three of a kind, Aces)
BIGDFROMTN: shows [Jc 6c] (a flush, Jack high)
BIGDFROMTN collected 160 from side pot
frankford: shows [9d Ac] (two pair, Aces and Nines)
BIGDFROMTN collected 4220 from main pot
*** SUMMARY ***
Total pot 4380 Main pot 4220. Side pot 160. | Rake 0
Board [As 9c 7c 2d 5c]
Seat 2: BIGDFROMTN showed [Jc 6c] and won (4380) with a flush, Jack
high
Seat 3: Holdie folded before Flop (didn't bet)
Seat 4: bcash folded before Flop (didn't bet)
Seat 5: slick klick folded before Flop (didn't bet)
Seat 6: la cumbia (button) folded before Flop (didn't bet)
Seat 7: Stacked07 (small blind) showed [Ad Ah] and lost with three of a
kind, Aces
Seat 8: MsMudPie (big blind) folded before Flop
Seat 9: frankford showed [9d Ac] and lost with two pair, Aces and Nines