Guangming Primary School newly bought 40 sets of single-person desks and chairs, each desk is 118 yuan, and each chair is 52 yuan. How much is the total cost for these desks and chairs?
光明小学新买了40套单人课桌椅，每张课桌118元，每把椅子52元，买这些课桌椅共需要多少元？
<gadget id="calculator">118 + 52</gadget>
<output>170</output>

<gadget id="calculator">170 * 40</gadget>
<output>6_800</output>

<result>6_800</result>