There are 80 tons of rice in the warehouse, the first time it is transported (3/20), the second time it is transported away (2/5), how many tons more than the first time?
仓库里有80吨大米，第一次运走它的(3/20)，第二次运走它的(2/5)，第二次比第一次多运多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 * (2/5)</gadget>
<output>32</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">80 * (3/20)</gadget>
<output>12</output>

<gadget id="calculator">32 - 12</gadget>
<output>20</output>

<result>20</result>