The restaurant purchased 40 sets of dining tables and chairs. Each table is 225 yuan, and each chair is 75 yuan. How much did you spend on these tables and chairs?
餐厅购进40套餐桌椅．每张桌子225元，每张椅子75元，购置这批桌椅一共花了多少钱？
<gadget id="calculator">225 + 75</gadget>
<output>300</output>

<gadget id="calculator">40 * 300</gadget>
<output>12_000</output>

<result>12_000</result>