Xiao Ming reads a story book, read 30 pages today, 20% more than yesterday, how many pages did he read yesterday?
小明看一本故事书，今天看了30页，比昨天多看20%，昨天看了多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">30 / (6/5)</gadget>
<output>25</output>

<result>25</result>