Dad entered a manuscript into the computer. In the morning, he entered 1/3 of the manuscript, in the afternoon, he entered 40 pages, and in the whole day, he entered half of the manuscript. How many pages does this manuscript have? (solution with equation)
爸爸向电脑中录入一本书稿，上午录入了全书稿的(1/3)，下午录入了40页，全天正好录入了全书稿的一半，这本书稿共有多少页？(用方程解答)
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">40 / (1/6)</gadget>
<output>240</output>

<result>240</result>