50 kg is reduced to 35 kg.
50千克减少多少以后是35千克．
<gadget id="calculator">50 - 35</gadget>
<output>15</output>

<gadget id="calculator">15 / 50</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>