The sum of (1/2) plus (2/3) is equal to (2/3) of a number. What is this number?
(1/2)加上(2/3)的和，等于一个数的(2/3)．这个数是多少？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/2) + (2/3)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">(7/6) / (2/3)</gadget>
<output>7/4 = around 1.75</output>

<result>7/4 = around 1.75</result>