How much is added to 50 kg is 60 kg.
50千克增加多少后是60千克．
<gadget id="calculator">60 - 50</gadget>
<output>10</output>

<gadget id="calculator">10 / 50</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>