The ratio of A and B is 5:3, and the difference is 18. What is their sum?
甲、乙两数的比是5：3，差是18，它们的和是多少．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">18 / 2</gadget>
<output>9</output>

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

<gadget id="calculator">9 * 8</gadget>
<output>72</output>

<result>72</result>