The grain store shipped 168 bags of rice, 35 kilograms each. After selling some of them, there were 42 bags left. How many kilograms were sold?
粮店运来168袋大米，每袋35千克，卖出一部分后，还剩42袋，卖出了多少千克？
<gadget id="calculator">168 - 42</gadget>
<output>126</output>

<gadget id="calculator">126 * 35</gadget>
<output>4_410</output>

<result>4_410</result>