Xiaoqing reads an extra-curricular book, originally planned to finish it in 18 days, and read 35 pages a day. If she wants to finish reading 3 days in advance, how many pages should she read on average every day?
小青读一本课外书，原计划18天读完，每天读35页，如果要提前3天读完，平均每天应读多少页？
<gadget id="calculator">18 - 3</gadget>
<output>15</output>

<gadget id="calculator">18 / 15</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">35 * (6/5)</gadget>
<output>42</output>

<result>42</result>