x-(1/2)x=3.6.
x-(1/2)x=3.6．
<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">3.6 / (1/2)</gadget>
<output>7.2</output>

<result>7.2</result>