3 desks are 50 yuan more expensive than 5 chairs. Each desk is 130 yuan, how much is each chair?
3张办公桌比5把椅子的价钱贵50元．每张办公桌130元，每把椅子多少元？
<gadget id="calculator">130 * 3</gadget>
<output>390</output>

<gadget id="calculator">390 - 50</gadget>
<output>340</output>

<gadget id="calculator">340 / 5</gadget>
<output>68</output>

<result>68</result>