A number is 0.4 more than its (2/3), find this number. (solution by equation)
一个数比它的(2/3)多0.4，求这个数．(用方程解)
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">0.4 / (1/3)</gadget>
<output>1.2</output>

<result>1.2</result>