Xiao Li did calculation questions, did 16 questions, and only completed (1/4) of the total task. How many calculation questions did Xiao Li use.
小李做计算题，做了16题，只完成总任务的(1/4)，小李原有多少题计算题．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">16 / (1/4)</gadget>
<output>64</output>

<result>64</result>