Xiaohong has been reading a storybook for 5 days, with an average of 16 pages per day. How many pages should she start reading on the sixth day?
小红看一本故事书，已经看了5天，平均每天看16页，第六天应从多少页页看起．
<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<gadget id="calculator">80 + 1</gadget>
<output>81</output>

<result>81</result>