Mom went to the vegetable market and bought 4 kilograms of tomatoes and some eggs for 31 yuan, of which 20 yuan was spent on tomatoes. If 4.4 yuan per kilogram of eggs, how many kilograms of eggs did mother buy? What other math questions can you ask? Parallel solution.
妈妈到菜市场用31元买了4千克西红柿和一些鸡蛋，其中买西红柿用去20元，如果每千克鸡蛋4.4元，那么妈妈买鸡蛋多少千克？你还能提出什么数学问题？并列式解答．
<gadget id="calculator">20 / 4</gadget>
<output>5</output>

<result>5</result>