18/1.5-(1/2)*0.2．
18/1.5-(1/2)*0.2．
<gadget id="calculator">18 / 1.5</gadget>
<output>12</output>

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

<gadget id="calculator">(1/2) * 0.2</gadget>
<output>0.1</output>

<gadget id="calculator">12 - 0.1</gadget>
<output>11.9</output>

<result>11.9</result>