The difference between the two numbers A and B is 35.4, the ratio of the two numbers A and B is 5:2, what is the sum of the two numbers.
甲、乙两个数的差是35.4，甲、乙两个数的比是5：2，两数之和是多少．
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">35.4 / 3</gadget>
<output>11.8</output>

<gadget id="calculator">5 + 2</gadget>
<output>7</output>

<gadget id="calculator">11.8 * 7</gadget>
<output>82.6</output>

<result>82.6</result>