Teacher Li distributes exercise books to 15 classes in the school. Each class gets 120 copies, and there are 60 copies left as spares. So, how many exercise books did the school buy in total?
李老师给全校15个班级分发练习本，每班级分得120本，还剩60本作为备用，那么，学校一共买来多少本练习本？
<gadget id="calculator">15 * 120</gadget>
<output>1_800</output>

<gadget id="calculator">1_800 + 60</gadget>
<output>1_860</output>

<result>1_860</result>