It takes team A 15 days to complete a project alone, team B 18 days, and team C 24 days. If teams A and B work together for 3 days and then team C works alone, how many days will it take for team C to complete it?
单独完成一项工程，甲队要15天，乙队要18天，丙队要24天，如果甲乙两队合作3天后，改由丙队独做，丙队还要多少天才能完成？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 18</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">(1/15) + (1/18)</gadget>
<output>11/90 = around 0.122222</output>

<gadget id="calculator">(11/90) * 3</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">1 - (11/30)</gadget>
<output>19/30 = around 0.633333</output>

<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(19/30) / (1/24)</gadget>
<output>76/5 = around 15.2</output>

<result>76/5 = around 15.2</result>