The school cafeteria bought back (4/5) tons of rice, ate (1/3) of it in the first week, and ate the remaining half in the second week. How many tons of rice did you eat in the second week?
学校食堂买回大米(4/5)吨，第一周吃了它的(1/3)，第二周又吃了剩下的一半，第二周吃了多少吨大米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(4/5) * (2/3) * (1/2)</gadget>
<output>4/15 = around 0.266667</output>

<result>4/15 = around 0.266667</result>