In one month, Liangliang read a total of 210 pages in the first 7 days. According to this calculation, how many pages did Liangliang read in total?
在一个月里，亮亮前7天共看书210页，照这样计算，这个月亮亮一共看书多少页？
<gadget id="calculator">210 / 7</gadget>
<output>30</output>

<gadget id="calculator">30 * 30</gadget>
<output>900</output>

<result>900</result>