Calculation: (2/3)-(2/3)*0.6+0.4.
计算：(2/3)-(2/3)*0.6+0.4．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) * 0.6</gadget>
<output>0.4</output>

<gadget id="calculator">(2/3) - 0.4</gadget>
<output>0.266667</output>

<gadget id="calculator">0.266667 + 0.4</gadget>
<output>0.666667</output>

<result>0.666667</result>