There is a container for cultivating certain microorganisms. The characteristics of this container are: put microorganisms in it, and then seal the container. Every night, the number of microorganisms in the container will double, but if the cover is opened during the day, The number of microorganisms in the container is reduced by exactly 16. Xiaoli put some microorganisms into the container on the first day of the laboratory. She was anxious and looked at it on the second, third and fourth days. On the fifth day, when he opened the container again, he was surprised to find that there were no microorganisms. Excuse me, how many microorganisms did Xiaoli put in the container?
有一个培养某种微生物的容器，这个容器的特点是：往里面放入微生物，再把容器封住，每过一个夜晚，容器里的微生物就会增加一倍，但是若在白天揭开盖子，容器内的微生物正好减少16个．小丽在实验室的当天往容器里放入一些微生物，心急的她在第二，三，四天都开封看了看，到了第五天，当他又启封查看时，惊讶得发现微生物都没了，请问，小丽开始往容器里放了多少微生物？
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">0 + 8 + 0 + 16</gadget>
<output>24</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">12 + 0 + 16</gadget>
<output>28</output>

<gadget id="calculator">28 / 2</gadget>
<output>14</output>

<gadget id="calculator">14 + 0 + 16</gadget>
<output>30</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<result>15</result>