The Young Pioneers planted 20 rows of trees in the Martyrs Cemetery, with 11 trees in each row. How many trees were planted in total?
少先队员在烈士陵园栽树，栽了20行，每行11棵，一共栽树多少棵树？
<gadget id="calculator">11 * 20</gadget>
<output>220</output>

<result>220</result>