Xiaoqing's weight is lighter (1/6) than Xiaoming's. Xiaoming is 30kg. How many kilograms is Xiaoqing's weight?
小青的体重比小明的体重轻(1/6)，小明30kg，小青体重是多少千克？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">30 * (5/6)</gadget>
<output>25</output>

<result>25</result>