The school-run factory of Tsinghua University has produced a batch of school aids, 60 pieces per box, which can hold 120 boxes. How many boxes can be filled if each box contains 80 pieces? (Solve with ratio)
清华校办工厂生产了一批学具，每箱装60件，可装120箱．如果每箱装80件，可装多少箱？(用比例解)
<gadget id="calculator">120 * 60</gadget>
<output>7_200</output>

<gadget id="calculator">7_200 / 80</gadget>
<output>90</output>

<result>90</result>