A set of 6 books of a certain kind is priced at 72 yuan. The bookstore sold 18 sets of such books yesterday. How much did they sell in total?
某种图书每套6本，售价72元．书店昨天共售出这样的图书18套，一共卖了多少钱？
<gadget id="calculator">72 * 18</gadget>
<output>1_296</output>

<result>1_296</result>