The difference and quotient of the two numbers A and B are both equal to 1.4. What is the sum of the two numbers A and B?
甲、乙两数的差及商都等于1.4，甲、乙两数的和是多少．
<gadget id="calculator">1.4 - 1</gadget>
<output>0.4</output>

<gadget id="calculator">1.4 / 0.4</gadget>
<output>3.5</output>

<gadget id="calculator">1.4 * 3.5</gadget>
<output>4.9</output>

<gadget id="calculator">3.5 + 4.9</gadget>
<output>8.4</output>

<result>8.4</result>