The school general affairs office bought 35 tables and 40 chairs, and paid 2658 yuan in total, 54 yuan per table, how much is a chair?
学校总务处买来35张桌子和40把椅子，共付2658元，每张桌子54元，一把椅子多少钱？
<gadget id="calculator">54 * 35</gadget>
<output>1_890</output>

<gadget id="calculator">2_658 - 1_890</gadget>
<output>768</output>

<gadget id="calculator">768 / 40</gadget>
<output>96/5 = around 19.2</output>

<result>96/5 = around 19.2</result>