The school buys 2 tables and 3 chairs for 90 yuan, and the price of each table is three times the price of each chair. How much is it per table?
学校买2张桌子和3把椅子共用90元钱，每张桌子的价钱是每把椅子价钱的3倍．每张桌子多少钱？
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">6 + 3</gadget>
<output>9</output>

<gadget id="calculator">90 / 9</gadget>
<output>10</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<result>30</result>