If a is a number greater than 0, then a+(2/3) is somewhat larger than (2/3)a.
如果a是大于0的数，那么a+(2/3)与(2/3)a比较，多少大些．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>