Equation (1/3) x=1 has the same solution as 2x+a=ax, then a=how much.
方程(1/3)x=1与2x+a=ax的解相同，则a=多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<result>3</result>