A pack of A4 copy paper, 35 sheets per day, will be used up in 30 days. How many days can it be used if you use less than 5 sheets per day?
一包A4复印纸，每天用35张，30天正好用完．如果每天少用5张，那么可以用多少天？
<gadget id="calculator">35 - 5</gadget>
<output>30</output>

<gadget id="calculator">30 / 30</gadget>
<output>1</output>

<gadget id="calculator">35 * 1</gadget>
<output>35</output>

<result>35</result>