A's number is 5.8, which is 1.2 more than B's number. What is the sum of A's and B's numbers?
甲数是5.8，比乙数多1.2，甲乙两数的和是多少．
<gadget id="calculator">5.8 - 1.2</gadget>
<output>4.6</output>

<gadget id="calculator">5.8 + 4.6</gadget>
<output>10.4</output>

<result>10.4</result>