There are 15 rows of pear trees and 34 rows of apple trees in Yimin Orchard, and each row has 21 trees. How many trees are there in Yimin Orchard?
益民果园有15行梨树和34行苹果树，每行都是21棵，益民果园这两种树共有多少棵？
<gadget id="calculator">15 + 34</gadget>
<output>49</output>

<gadget id="calculator">49 * 21</gadget>
<output>1_029</output>

<result>1_029</result>