The ratio of the two numbers of A and B is 8:5. After giving A's (2/5) to B, B has 3 more than A. What is the original sum of the two numbers?
甲乙两数的比是8：5，把甲的(2/5)给乙后，乙比甲多3，原来两数的和是多少？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 8</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">8 * (2/5)</gadget>
<output>16/5 = around 3.2</output>

<gadget id="calculator">(16/5) - 8</gadget>
<output>-24/5 = around -4.8</output>

<gadget id="calculator">5 + (16/5) + (-24/5)</gadget>
<output>17/5 = around 3.4</output>

<gadget id="calculator">3 / (17/5)</gadget>
<output>15/17 = around 0.882353</output>

<gadget id="calculator">13 * (15/17)</gadget>
<output>195/17 = around 11.470588</output>

<result>195/17 = around 11.470588</result>