Mom bought a box of pears weighing 15 kg and ate (1/2) of this box of pears in the first week, and ate less (1/5) in the second week than in the first week. How many kilograms did she eat in the second week?
妈妈买了一箱梨重15千克第一周吃了这箱梨的(1/2)，第二周比第一周少吃了(1/5)，第二周吃了多少千克．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<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">15 * (1/2) * (4/5)</gadget>
<output>6</output>

<result>6</result>