Solve the equation: 2(x-0.3)=1.8.
解方程：2(x-0.3)=1.8．
<gadget id="calculator">2 * 0.3</gadget>
<output>0.6</output>

<gadget id="calculator">0.6 + 1.8</gadget>
<output>2.4</output>

<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<result>1.2</result>