How many kilometers is (2/3) of 15 kilometers?
15千米的(2/3)是多少千米．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">15 * (2/3)</gadget>
<output>10</output>

<result>10</result>