Xiao Ming reads a 200-page story book. He reads the whole book (1/4) on the first day and the rest (3/10) on the second day. How many pages did you read the next day?
小明看一本200页的故事书，第一天看了全书的(1/4)，第二天看了余下的(3/10)．第二天看了多少页？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">200 * (3/4) * (3/10)</gadget>
<output>45</output>

<result>45</result>