Grandma Wang has wholesaled 3 boxes of ice cream, each with 30 pieces, and the price of each box is 60 yuan. If they are sold out at 3 yuan per piece, how much money can they make?
王婆婆批发了3箱冰糕，每箱有30支，每箱的价格是60元，如果按3元/只的售价全卖完，可以赚多少钱？
<gadget id="calculator">30 * 3 * 3</gadget>
<output>270</output>

<gadget id="calculator">60 * 3</gadget>
<output>180</output>

<gadget id="calculator">270 - 180</gadget>
<output>90</output>

<result>90</result>