Damei memorizes 30 English words in the vocabulary book at home every day. After 12 days, she finds that there are still (1/6) not memorized. So how many words do you need to memorize in this book?
大美在家记单词书上的英语单词，每天记30个，12天后发现还有(1/6)没有记，那么这本书一共有多少个单词需要记．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">12 / (5/6)</gadget>
<output>72/5 = around 14.4</output>

<gadget id="calculator">30 * (72/5)</gadget>
<output>432</output>

<result>432</result>