Note stack sizes:

PokerStars No-Limit Hold'em, $0.25 BB (7 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

SB ($10.35)
Hero ($40.10)
UTG ($24.40)
MP1 ($25.45)
MP2 ($9.75)
CO ($30.40)
Button ($26.15)

Preflop: Hero is BB with K, A.
1 fold, MP1 calls $0.25, MP2 calls $0.25, 2 folds, SB completes, Hero raises to $1, MP1 calls $0.75, MP2 calls $0.75, SB folds.

Flop: ($3.25) 6, K, 8 (3 players)
Hero bets $3, MP1 calls $3, MP2 folds.

Turn: ($9.25) K (2 players)
Hero bets $5, MP1 calls $5.

River: ($19.25) T (2 players)

Villain now has $16 left. I have $31.