Xiao Ming reads a 280-page story book. He reads (1/7) of the whole book on the first day and (1/8) of the whole book on the second day. On the third day, which page should Xiao Ming start to read?
小明看一本280页的故事书，第一天看了全书的(1/7)，第二天看了全书的(1/8)，第三天小明要从第几页开始看？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/7) + (1/8)</gadget>
<output>15/56 = around 0.267857</output>

<gadget id="calculator">280 * (15/56)</gadget>
<output>75</output>

<gadget id="calculator">75 + 1</gadget>
<output>76</output>

<result>76</result>