One addend is (3/12), which is less than the other addend (1/12), what is the sum of the two numbers?
一个加数是(3/12)，比另一个加数少(1/12)，两数之和是多少？
<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/4) + (1/12)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/4) + (1/3)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>