Fumin Engineering Company and Kunming Road and Bridge Group invited bids to build the Qingtuan Highway. It would take 15 days for Fumin Engineering Company to complete the road alone, and it would take 5 days less for Kunming Road and Bridge Group to complete the road alone. If Fumin Engineering Company and Kunming Road and Bridge Group jointly Get up and fix it, how many days will it finish?
富民工程公司与昆明路桥集团招标修青团公路，富民工程公司单独修完这条路要15天，昆明路桥集团单独修完这条路要少用5天，如果富民工程公司与昆明路桥集团一起来修，几天修完？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">15 - 5</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/15) + (1/10)</gadget>
<output>1/6 = around 0.166667</output>

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

<result>6</result>