An ecological orchard in the suburbs harvested 215 tons of oranges this year, about 21 times more dates than oranges. About how many tons of dates were collected?
郊区一生态果园今年收了215吨桔子，收的枣子大约是桔子的21倍．大约收了多少吨枣子？
<gadget id="calculator">215 * 21</gadget>
<output>4_515</output>

<result>4_515</result>