A's number is 4.8, which is 1.9 more than B's number. What is the sum of A's and B's numbers?
甲数是4.8，比乙数多1.9，甲、乙两数的和是多少
<gadget id="calculator">4.8 - 1.9</gadget>
<output>2.9</output>

<gadget id="calculator">2.9 + 4.8</gadget>
<output>7.7</output>

<result>7.7</result>