The school bought 15 magnetic small blackboards for the first time, each at 26 yuan, and bought 8 of the same small blackboards for the second time. How much is the total payment?
学校第一次购买15块磁性小黑板，每块26元，第二次又买了同样的小黑板8块，一共应付多少元？
<gadget id="calculator">15 + 8</gadget>
<output>23</output>

<gadget id="calculator">23 * 26</gadget>
<output>598</output>

<result>598</result>