A flour mill processes 987 kilograms of flour in January, which is three times that of February. The flour processed in March is 39 kilograms less than twice that processed in February. How many kilograms of flour are processed in March?
一个面粉厂一月份加工面粉987千克，是二月份的3倍．三月份加工的面粉比二月份加工的2倍少39千克，三月份加工面粉多少千克？
<gadget id="calculator">987 / 3</gadget>
<output>329</output>

<gadget id="calculator">329 * 2</gadget>
<output>658</output>

<gadget id="calculator">658 - 39</gadget>
<output>619</output>

<result>619</result>