Xinming Primary School bought 45 sets of desks and chairs for one person, each desk was 145 yuan, and each chair was 55 yuan. How much did they spend in total?
新名小学买来45套单人课桌椅，每张课桌145元，每把椅子55元，一共用了多少元？
<gadget id="calculator">145 + 55</gadget>
<output>200</output>

<gadget id="calculator">200 * 45</gadget>
<output>9_000</output>

<result>9_000</result>