To build a road, Team A needs 12 days to complete the project alone, and Team B needs 10 days to complete the project alone. Now Team A works for 3 days and then leaves due to an accident. Team B will continue to complete the rest. How many days will it take?
修一条路，甲队独修要12天完成，乙队独修要10天完成，现在甲队先做3天后，因事离开，余下的由乙接着完成，还要多少天？
<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) * 3</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) / (1/10)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>