The third-grade students planted 480 trees this year, eight times the number of trees planted last year. How many trees were planted last year?
三年级学生今年植树480棵，是去年植树棵树的8倍，去年植树多少棵？
<gadget id="calculator">480 / 8</gadget>
<output>60</output>

<result>60</result>