nl10 6max call or fold on river ?

[pestik]

PokerStars No-Limit Hold'em, $0.10 BB (5 handed)
Pokeroff Hand Converter

saw flop|<font color="#C00000">saw showdown</font>

Button ($10.35)
SB ($22)
Hero ($27.40)
UTG ($11.15)
MP ($9.55)

Preflop: Hero is BB with A[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">SB raises to $0.3</font>, Hero calls $0.20.

Flop: ($0.60) 9[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $0.5</font>, SB calls $0.50.

Turn: ($1.60) 2[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

River: ($1.60) 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets $2.3</font>, <font color="#CC3333">Hero raises to $4.6</font>, <font color="#CC3333">SB raises to $21.2</font>, Hero folds.

Final Pot: $27.40
<font color="#009B00">Main Pot: $10.80, won by SB.</font>
<font color="#009B00">Pot 2: $16.60, returned to SB.</font>

Results in white below: <font color="#FFFFFF">
SB doesn't show.
Outcome: SB wins $27.40. </font>

hello 2+2 people just started to play poker and i hope u will help me with some of mine hands %)