The price of cabbage in the vegetable wholesale market is 2.6 yuan per kilogram. If you buy 50 kilograms, you can sell it at half price. The school paid 189.8 yuan for the cabbage. How many kilograms of cabbage did the school buy?
蔬菜批发市场的白菜每千克的售价是2.6元，如果买满50千克可以按半价出售，学校买白菜共付了189.8元，学校买了几千克白菜？
<gadget id="calculator">2.6 / 2</gadget>
<output>1.3</output>

<gadget id="calculator">189.8 / 1.3</gadget>
<output>146</output>

<result>146</result>