There are 15 tons of flour in the grain depot at the lower river line of Lengshuitan. Take away (1/5) of the total in the first time, and take away the rest (3/5) in the second time, how many tons of flour are left?
冷水滩下河线粮库有15吨面粉．第一次运走总数的(1/5)，第二次运走剩下的(3/5)，还剩多少吨面粉？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">15 * (4/5) * (2/5)</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>