There are 60 tons of goods stored in warehouses A and B. After transporting (2/5) from warehouse A to warehouse B, the weight ratio of goods in warehouses A and B is 2:3. How many tons more warehouse A than warehouse B? ．
甲、乙两个仓库共存货物60吨，把甲仓的(2/5)运往乙仓后，这时甲、乙两仓货物的重量比是2：3，原来甲仓比乙仓多多少吨．
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/5) / (3/5)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 * (2/3)</gadget>
<output>40</output>

<gadget id="calculator">60 - 40</gadget>
<output>20</output>

<gadget id="calculator">40 - 20</gadget>
<output>20</output>

<result>20</result>