The school bought 130 bottles of blue ink, and the number of red ink bottles bought was 90 bottles less than three times that of blue ink. How many bottles of red ink did the school buy?
学校买来蓝墨水130瓶，买来的红墨水瓶数比蓝墨水的3倍少90瓶，学校买来红墨水多少瓶？
<gadget id="calculator">130 * 3</gadget>
<output>390</output>

<gadget id="calculator">390 - 90</gadget>
<output>300</output>

<result>300</result>