When x>0, compare the results of the two formulas x*(2/5) and x+(2/5), how much
当x＞0时，比较x*(2/5)和x+(2/5)两个算式的结果，多少
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>