Uncle Zhang spent 240 yuan to wholesale 80 kilograms of bananas, and sold 60 kilograms at a price of 4 yuan per kilogram. The rest is sold for 3 yuan per kilogram, how much money does Uncle Zhang make? (calculated in two ways)
章叔叔花240元钱批发了80千克香蕉，以每千克4元的价钱卖出了60千克．剩下的每千克卖3元，章叔叔赚了多少钱？(用两种方法计算)
<gadget id="calculator">240 / 80</gadget>
<output>3</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">1 * 4 * 60</gadget>
<output>240</output>

<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">3 * 20</gadget>
<output>60</output>

<gadget id="calculator">60 - 240</gadget>
<output>-180</output>

<gadget id="calculator">240 + (-180)</gadget>
<output>60</output>

<result>60</result>