How much is more (1/3) than 15 yuan.
比15元多(1/3)的是多少元．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">15 * (1/3)</gadget>
<output>5</output>

<gadget id="calculator">5 + 15</gadget>
<output>20</output>

<result>20</result>