Hope Primary School has 24 classes, with an average of 46 students in each class. This semester, the school replaced the wooden tables and chairs of all students with steel and wooden tables and chairs, leaving 75 sets for spare. How many sets of student desks and chairs has the school purchased?
希望小学共有24个班级，平均每个班有46名学生，这学期学校把所有学生的木桌椅换成钢木桌椅，还留75套备用．学校购买了多少套学生桌椅？
<gadget id="calculator">46 * 24</gadget>
<output>1_104</output>

<gadget id="calculator">1_104 + 75</gadget>
<output>1_179</output>

<result>1_179</result>