For a manuscript, it takes 10 hours for A to type alone, and only 1/3 of the manuscript for B to type in 4 hours alone. Now that they are working together, how many hours will they finish typing this manuscript?
一份稿件，甲单独打要10小时，乙单独打4小时只完成这份稿件的(1/3)，现在两人合作，几小时打完这份稿件？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/3) / 4</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/10) + (1/12)</gadget>
<output>11/60 = around 0.183333</output>

<gadget id="calculator">1 / (11/60)</gadget>
<output>60/11 = around 5.454545</output>

<result>60/11 = around 5.454545</result>