6*40%-45*0.04+3*(2/5).
6*40%-45*0.04+3*(2/5)．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">6 * (2/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">45 * 0.04</gadget>
<output>1.8</output>

<gadget id="calculator">(12/5) - 1.8</gadget>
<output>0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 * (2/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">0.6 + (6/5)</gadget>
<output>1.8</output>

<result>1.8</result>