x-(1/2)x=7.2.
x-(1/2)x=7.2．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">7.2 / (1/2)</gadget>
<output>14.4</output>

<result>14.4</result>