The maximum profit the writer of the Samsung May 110 put contract can gain is equal to the premium received for selling the contract, which in this case is $5 per share. Since one contract equals 100 shares, the maximum profit for the writer is $500 (100 shares x $5 premium).
However, it's important to note that the writer's profit is limited to the amount of the premium received, unlike the buyer of the put option who has potentially unlimited profit potential if the underlying stock price drops significantly.