Table 42.8 yuan/piece, chair 12.2 yuan/piece. How much does the experimental primary school purchase 300 sets of desks and chairs?
桌子42.8元/张，椅子12.2元/把．实验小学购进300套课桌椅，一共需要多少钱？
<gadget id="calculator">42.8 + 12.2</gadget>
<output>55</output>

<gadget id="calculator">55 * 300</gadget>
<output>16_500</output>

<result>16_500</result>