It costs 400 yuan to buy 5 tables and 10 chairs, and the price of buying 1 table and 2 chairs is exactly the same. How much is the price of each table.
买5张桌子和10把椅子共400元，买1张桌子和2把椅子的价钱正好相等．每张桌子的价钱是多少元．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">400 / 10</gadget>
<output>40</output>

<result>40</result>