Solution of the series of equations. What number (1/3) plus (2/3) is 12?
列方程解．什么数的(1/3)加上(2/3)后得12？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">12 - (2/3)</gadget>
<output>34/3 = around 11.333333</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(34/3) / (1/3)</gadget>
<output>34</output>

<result>34</result>