The school will replace the students with new desks and chairs in the next semester. A single table is 158 yuan, a chair is 42 yuan, and a set of new desks and chairs for 45 students in Class 4 and Class 1. How much will it cost in total?
学校要在下学期为同学们换上新课桌椅，单人桌158元一张，椅子42元一把，四1班45人每人一套新课桌椅，共要花费多少元？
<gadget id="calculator">158 + 42</gadget>
<output>200</output>

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

<result>9_000</result>