Solve the equation containing x (x-0.4): 8=3:2.
解含x的方程(x-0.4)：8=3：2．
<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<gadget id="calculator">24 + 0.8</gadget>
<output>24.8</output>

<gadget id="calculator">24.8 / 2</gadget>
<output>12.4</output>

<result>12.4</result>