A book has 120 pages, and Xiaohong reads 18 pages every day. He reads it for 5 days, and how many pages should he read on the 6th day.
一本书有120页，小红每天看18页，他看了5天，第6天应从第多少看起．
<gadget id="calculator">18 * 5</gadget>
<output>90</output>

<gadget id="calculator">90 + 1</gadget>
<output>91</output>

<result>91</result>