A chair is 40 yuan, and a table is three times that of a chair. How much is a set of tables and chairs?
一张椅子40元，一张桌子是一张椅子的3倍，一套桌椅共多少钱？
<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">40 + 120</gadget>
<output>160</output>

<result>160</result>