Options are traded in units of contracts.
For example, there is an option contract TCH 190829 140.00C. Its quoted price is 16.7 HKD and each contract corresponds to 100 Tencent shares. Therefore, the price (premium) of this contract is 16.7 * 100 = 1670 HKD. Upon exercise, you will receive 100 shares of Tencent.