Chen Yu: It is best not to carry more than 3/20 of our body weight. If we carry heavy objects for a long time, it will seriously affect our growth. My weight is 45kg, and my schoolbag weighs 6kg. Sun Min's weight is 38kg, how many kilograms should his load not exceed? Is Chen Yu's schoolbag overweight? Why?
陈玉：我们的负重最好不要超过体重的(3/20)．如果长期背负过重的物体，会严重的影响我们的成长．我体重为45kg，书包重6kg．孙民的体重是38kg，他的负重最好不要超过多少千克？陈玉的书包超重吗？为什么？
<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">38 * (3/20)</gadget>
<output>57/10 = around 5.7</output>

<result>57/10 = around 5.7</result>