Liu Shan is 12 years old and weighs 58 kilograms, which is an overweight child. She joined a health club and lost an average of 0.6 kilograms per week. Four weeks have passed. How many kilograms does Li Lin weigh now?
刘杉今年12岁，体重为58千克，属于超重儿童．她加入一个健康俱乐部，平均每个星期体重减轻了0.6千克，四个星期过去了，请问李林现在的体重多少千克？
<gadget id="calculator">0.6 * 4</gadget>
<output>2.4</output>

<gadget id="calculator">58 - 2.4</gadget>
<output>55.6</output>

<result>55.6</result>