The ratio of Wang Wei and Li Ming's original books is 1:5. Later Li Ming gave Wang Wei a book. At this time, the book ratio between Wang Wei and Li Mingshu was 1:4. How many books do Wang Wei and Li Ming have in total?
王伟和李明原有图书本书的比是1：5．后来李明给王伟1本图书．这时王伟与李明图书的本书比是1：4．王伟与李明一共有图书多少本？
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/5) - (1/6)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / (1/30)</gadget>
<output>30</output>

<result>30</result>