Suppose a and b are two numbers, and a:b=3:5, ba=24, then a+b=how much.
设a，b为两个数，且a：b=3：5，b-a=24，那么a+b=多少．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">12 * 8</gadget>
<output>96</output>

<result>96</result>