Each chair is 102 yuan, and the price of a table is twice that of the chair. How much does it cost to buy a table and a chair? ?
每张椅子102元，一张桌子的价格是椅子的2倍，买一张桌子和一张椅子共多少钱？？
<gadget id="calculator">102 * 2</gadget>
<output>204</output>

<gadget id="calculator">204 + 102</gadget>
<output>306</output>

<result>306</result>