Each table is 330 yuan, and each chair is 75 yuan. The school bought 18 sets of such tables and chairs. How much did it cost in total?
桌子每张330元，椅子每把75元，学校买来这样的桌椅18套，一共花了多少元？
<gadget id="calculator">330 + 75</gadget>
<output>405</output>

<gadget id="calculator">405 * 18</gadget>
<output>7_290</output>

<result>7_290</result>