1,200 cartons of beverages are shipped to the supermarket, of which mineral water accounts for (1/3), carbonated drinks account for (2/5), and the rest are fruit juice drinks. How many cartons of fruit juice drinks are shipped?
超市里运进1200箱饮料，其中矿泉水占(1/3)，碳酸饮料占(2/5)，其余的是果汁类饮，果汁类饮料运来多少箱？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">1_200 * (4/15)</gadget>
<output>320</output>

<result>320</result>