Xiaohong borrowed a 150-page story book, and she read 45 pages in 3 days. At this speed, can you finish reading in the remaining few days? (Solved by two methods of arithmetic method and ratio)
小红借了一本150页的故事书，她3天看了45页．照这样的速度，剩下的几天能看完？(用算术方法和比例两种方法解答)
<gadget id="calculator">150 - 45</gadget>
<output>105</output>

<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<gadget id="calculator">105 / 15</gadget>
<output>7</output>

<result>7</result>