The unit price of a table is 80 yuan, and the unit price of a chair is 40 yuan. If it is sold at a 15% discount, how much is the price of a set of tables and chairs?
一张桌子单价80元，一把椅子单价40元，如果打八五折出售，一套桌椅售价多少元？
<gadget id="calculator">80 + 40</gadget>
<output>120</output>

<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">120 * (17/20)</gadget>
<output>102</output>

<result>102</result>