There is a project that takes 3 days for Xiao Hua, 4 days for Xiao Li, 5 days for Xiao Hua, how many days will it take for the three to work together?
有一项工程，小华做需要3天，小李做需要4天，小花做需要5天，三人合作需要多少天？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/3) + (1/4) + (1/5)</gadget>
<output>47/60 = around 0.783333</output>

<gadget id="calculator">1 / (47/60)</gadget>
<output>60/47 = around 1.276596</output>

<result>60/47 = around 1.276596</result>