Xiaoqiao memorized 64 English words on weekends, four times the number of words Xiaoya memorized. How many words did Xiaoya memorize?
小巧双休日背了64个英语单词，是小亚背的单词数的4倍，小亚背了多少个单词？
<gadget id="calculator">64 / 4</gadget>
<output>16</output>

<result>16</result>