There is a kind of ice cream whose wholesale price is 0.38 yuan each. Uncle Wang buys 30 ice creams like this and sells them at a price of 0.5 yuan each. How much gross profit can he get if he sells all of them?
有一种雪糕的批发价是每根0.38元．王叔叔购进30根这样的雪糕，以每根0.5元的价格卖出，全部卖完可得毛利多少元？
<gadget id="calculator">0.5 - 0.38</gadget>
<output>0.12</output>

<gadget id="calculator">30 * 0.12</gadget>
<output>3.6</output>

<result>3.6</result>