There is a batch of 25 tons of goods in the market, and 4 tons are more than 40% of the total shipped out for the first time. How many tons are left? (solution by equation)
商场上有一批货25吨，第一次运出总数的40%多4吨，还剩多少吨？(用方程解)
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 25</gadget>
<output>10</output>

<gadget id="calculator">25 - 10 - 4</gadget>
<output>11</output>

<result>11</result>