15 kilograms is less than 20 kilograms ((())/(())), and it is more than 0.6 tons (1/2). How many tons is it?
15千克比20千克少((())/(()))，比0.6吨多(1/2)是多少吨．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">0.6 * (3/2)</gadget>
<output>0.9</output>

<result>0.9</result>