A's number is 42.7, which is 1.8 less than B's number, what is the sum of A's and B's two numbers
甲数是42.7，比乙数少1.8，甲乙两数之和是多少
<gadget id="calculator">42.7 + 1.8 + 42.7</gadget>
<output>87.2</output>

<result>87.2</result>