There are 15 boxes of Coke and 20 boxes of orange juice, and each box contains 24 bottles. How many bottles are there in total?
有15箱可乐和20箱桔汁，每箱都装24瓶，一共有多少瓶饮料？
<gadget id="calculator">15 + 20</gadget>
<output>35</output>

<gadget id="calculator">24 * 35</gadget>
<output>840</output>

<result>840</result>