Zhang Li reads a 360-page story book. The ratio of the number of pages she has read to the number of pages she has not read is 5:4. How many pages of this storybook did Zhang Li not read?
张丽看一本360页的故事书，已看的页数与未看的页数的比是5：4．这本故事书张丽还有多少页没有看？
<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">360 / 9</gadget>
<output>40</output>

<gadget id="calculator">40 * 4</gadget>
<output>160</output>

<result>160</result>