There were 6,850 books in the school library, 109 of which were removed due to damage, and 1,378 books were replenished by students on Children's Day. How many books are there in the school?
学校图书室原有藏书6850本，有109册因损坏被清除了，六一儿童节时同学们又补了1378册，学校现有图书多少册？
<gadget id="calculator">6_850 - 109</gadget>
<output>6_741</output>

<gadget id="calculator">6_741 + 1_378</gadget>
<output>8_119</output>

<result>8_119</result>