For a road construction project, if A and B cooperate directly, and the repair is completed in 5 days, A first works for 3 days, and A and B cooperate. In the end, A repairs 10 kilometers more than B. M, so who is the fastest of the two teams? How much faster?
一个修路工程，若甲乙直接合作，5天修完，甲先做3天后，甲乙合作，最后甲比乙多修10千米，乙先做两天后甲乙合作，最后乙比甲多修15千米，那么两队谁做得速度快？快多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">10 / (1/10)</gadget>
<output>100</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) / 5</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">100 * (3/25)</gadget>
<output>12</output>

<gadget id="calculator">(2/5) / 5</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">100 * (2/25)</gadget>
<output>8</output>

<gadget id="calculator">12 - 8</gadget>
<output>4</output>

<result>4</result>