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

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">4 + (7/12)</gadget>
<output>55/12 = around 4.583333</output>

<gadget id="calculator">(55/12) * 12</gadget>
<output>55</output>

<result>55</result>